Properties of the Number 16644

Sixteen Thousand Six Hundred Forty-Four

Basics

Value: 16643 → 16644 → 16645

Parity: even

Prime: No

Previous Prime: 16633

Next Prime: 16649

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 19 × 73

Divisors: 1, 2, 3, 4, 6, 12, 19, 38, 57, 73

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000100000100

Octal: 40404

Duodecimal: 9770

Hexadecimal: 4104

Square: 277022736

Square Root: 129.0116273829611

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

Partial sums of A299285. A299286

Numbers that are the sum of 7 positive 7th powers. A3374

Array read by rows: T(n,k) is the number of directed multigraphs with loops with n arcs, k vertices, and no vertex of degree 0. A136564

Dirichlet g.f.: ∏_k>=2 (1 + k^-s)^{4^(k-1}). A344267

Numbers that are the sum of nine fourth powers in exactly ten ways. A345852

a(n) = C(n+2, 2) + C(n+2, 3) + C(n+2, 4) + C(n+2, 5). A27660

Numbers k such that k | sigma₆(k). A55710

a(n) = n·sigma₆(n). A386750

Sums of 3 distinct powers of 4. A38471

Base-2 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0,0,0,0. A195904