Properties of the Number 64568

Sixty-Four Thousand Five Hundred Sixty-Eight

Basics

Value: 64567 → 64568 → 64569

Parity: even

Prime: No

Previous Prime: 64567

Next Prime: 64577

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 7 × 1153

Divisors: 1, 2, 4, 7, 8, 14, 28, 56, 1153, 2306

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111110000111000

Octal: 176070

Duodecimal: 31448

Hexadecimal: fc38

Square: 4169026624

Square Root: 254.10234158700703

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing. A203714

Numbers k such that 7·R_k - 4 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A99420

Diagonal of rational function 1/(1 - (1 + x·y) * (x³ + y³)). A361727

Number of 3-covers of an unlabeled n-set. A55195

Number of (n+1)X2 0..5 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing. A203710

Number of (n+1)X4 0..5 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing. A203712

n-th term in Recamán's sequence A005132 is divisible by n. A64568

Number of (n+1) X (5+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). A234879