16523087868 has 36 divisors (see below), whose sum is σ = 47733365680. Its totient is φ = 4720882176.

The previous prime is 16523087849. The next prime is 16523087881. The reversal of 16523087868 is 86878032561.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32783653 + ... + 32784156.

Almost surely, 2^16523087868 is an apocalyptic number.

16523087868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16523087868 is an abundant number, since it is smaller than the sum of its proper divisors (31210277812).

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

16523087868 is a wasteful number, since it uses less digits than its factorization.

16523087868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65567826 (or 65567821 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 16523087868 in words is "sixteen billion, five hundred twenty-three million, eighty-seven thousand, eight hundred sixty-eight".