16521047364 has 12 divisors (see below), whose sum is σ = 38549110544. Its totient is φ = 5507015784.

The previous prime is 16521047351. The next prime is 16521047401. The reversal of 16521047364 is 46374012561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688376962 + ... + 688376985.

Almost surely, 2^16521047364 is an apocalyptic number.

It is an amenable number.

16521047364 is an abundant number, since it is smaller than the sum of its proper divisors (22028063180).

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

16521047364 is a wasteful number, since it uses less digits than its factorization.

16521047364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376753954 (or 1376753952 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 16521047364 in words is "sixteen billion, five hundred twenty-one million, forty-seven thousand, three hundred sixty-four".