16521011496 has 96 divisors (see below), whose sum is σ = 49639543200. Its totient is φ = 4921499520.

The previous prime is 16521011491. The next prime is 16521011497. The reversal of 16521011496 is 69411012561.

16521011496 is a `hidden beast` number, since 1 + 65 + 2 + 101 + 1 + 496 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 16521011496.

It is not an unprimeable number, because it can be changed into a prime (16521011491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130051 + ... + 223506.

It is an arithmetic number, because the mean of its divisors is an integer number (517078575).

Almost surely, 2^16521011496 is an apocalyptic number.

It is an amenable number.

16521011496 is an abundant number, since it is smaller than the sum of its proper divisors (33118531704).

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

16521011496 is a wasteful number, since it uses less digits than its factorization.

16521011496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353639 (or 353632 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 16521011496 in words is "sixteen billion, five hundred twenty-one million, eleven thousand, four hundred ninety-six".