16856572446 has 64 divisors (see below), whose sum is σ = 43034664960. Its totient is φ = 4790927520.

The previous prime is 16856572427. The next prime is 16856572477. The reversal of 16856572446 is 64427565861.

16856572446 is a `hidden beast` number, since 1 + 6 + 8 + 565 + 72 + 4 + 4 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 16856572392 and 16856572401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44541 + ... + 188936.

It is an arithmetic number, because the mean of its divisors is an integer number (672416640).

Almost surely, 2^16856572446 is an apocalyptic number.

16856572446 is an abundant number, since it is smaller than the sum of its proper divisors (26178092514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16856572446 is a wasteful number, since it uses less digits than its factorization.

16856572446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233686 (or 233680 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 16856572446 in words is "sixteen billion, eight hundred fifty-six million, five hundred seventy-two thousand, four hundred forty-six".