16721256264 has 16 divisors (see below), whose sum is σ = 41803140720. Its totient is φ = 5573752080.

The previous prime is 16721256239. The next prime is 16721256329. The reversal of 16721256264 is 46265212761.

16721256264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16721256264² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348359482 + ... + 348359529.

It is an arithmetic number, because the mean of its divisors is an integer number (2612696295).

Almost surely, 2^16721256264 is an apocalyptic number.

It is an amenable number.

16721256264 is an abundant number, since it is smaller than the sum of its proper divisors (25081884456).

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

16721256264 is a wasteful number, since it uses less digits than its factorization.

16721256264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696719020 (or 696719016 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The spelling of 16721256264 in words is "sixteen billion, seven hundred twenty-one million, two hundred fifty-six thousand, two hundred sixty-four".