16591997804 has 48 divisors (see below), whose sum is σ = 30107406336. Its totient is φ = 7996968000.

The previous prime is 16591997797. The next prime is 16591997813. The reversal of 16591997804 is 40879919561.

It is a super-2 number, since 2×16591997804² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2568779 + ... + 2575229.

It is an arithmetic number, because the mean of its divisors is an integer number (627237632).

Almost surely, 2^16591997804 is an apocalyptic number.

It is an amenable number.

16591997804 is a deficient number, since it is larger than the sum of its proper divisors (13515408532).

16591997804 is a wasteful number, since it uses less digits than its factorization.

16591997804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6726 (or 6724 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 16591997804 in words is "sixteen billion, five hundred ninety-one million, nine hundred ninety-seven thousand, eight hundred four".