16738521816 has 32 divisors (see below), whose sum is σ = 41851508400. Its totient is φ = 5578813440.

The previous prime is 16738521809. The next prime is 16738521847. The reversal of 16738521816 is 61812583761.

It is a super-2 number, since 2×16738521816² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176376 + ... + 254136.

Almost surely, 2^16738521816 is an apocalyptic number.

It is an amenable number.

16738521816 is an abundant number, since it is smaller than the sum of its proper divisors (25112986584).

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

16738521816 is a wasteful number, since it uses less digits than its factorization.

16738521816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86739 (or 86735 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The spelling of 16738521816 in words is "sixteen billion, seven hundred thirty-eight million, five hundred twenty-one thousand, eight hundred sixteen".