Properties of the Number 64638

Sixty-Four Thousand Six Hundred Thirty-Eight

Basics

Value: 64637 → 64638 → 64639

Parity: even

Prime: No

Previous Prime: 64633

Next Prime: 64661

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ⁵ × 7 × 19

Divisors: 1, 2, 3, 6, 7, 9, 14, 18, 19, 21

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110001111110

Octal: 176176

Duodecimal: 314A6

Hexadecimal: fc7e

Square: 4178071044

Square Root: 254.24004405285962

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

Sum of cubes of unitary divisors of n. A34677

Numbers n such that prime(n) - n is a prime power. A109315

Triangle read by rows: numerators of coefficients (highest degree first) of polynomials interpolating Fibonacci numbers. A322044

Triangle read by rows: expansion of p(x,n)=If[n == 0, 1, (x + 1)ⁿ + 2^{n - 1}*Sum[Binomial[n, m]*x^m*(1 + x^{n - 2·m}), {m, 1, n - 1}]]. A146765

Positions of non-crossing fixed-point-free involutions encoded by A014486 in A055089. Permutation of A064640. A64638