16572720051 has 12 divisors (see below), whose sum is σ = 23947410760. Its totient is φ = 11044308960.

The previous prime is 16572720049. The next prime is 16572720053. The reversal of 16572720051 is 15002727561.

16572720051 is a `hidden beast` number, since 16 + 572 + 7 + 20 + 0 + 51 = 666.

It is an interprime number because it is at equal distance from previous prime (16572720049) and next prime (16572720053).

It is not a de Polignac number, because 16572720051 - 2¹ = 16572720049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16572719988 and 16572720015.

It is not an unprimeable number, because it can be changed into a prime (16572720053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322330 + ... + 370191.

Almost surely, 2^16572720051 is an apocalyptic number.

16572720051 is a deficient number, since it is larger than the sum of its proper divisors (7374690709).

16572720051 is a wasteful number, since it uses less digits than its factorization.

16572720051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695186 (or 695183 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The spelling of 16572720051 in words is "sixteen billion, five hundred seventy-two million, seven hundred twenty thousand, fifty-one".