17977786964 has 12 divisors (see below), whose sum is σ = 31495668288. Its totient is φ = 8979024600.

The previous prime is 17977786913. The next prime is 17977786987. The reversal of 17977786964 is 46968777971.

It is a congruent number.

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, 2463122 + ... + 2470409.

It is an arithmetic number, because the mean of its divisors is an integer number (2624639024).

Almost surely, 2^17977786964 is an apocalyptic number.

It is an amenable number.

17977786964 is a deficient number, since it is larger than the sum of its proper divisors (13517881324).

17977786964 is a wasteful number, since it uses less digits than its factorization.

17977786964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934446 (or 4934444 counting only the distinct ones).

The product of its digits is 224042112, while the sum is 71.

The spelling of 17977786964 in words is "seventeen billion, nine hundred seventy-seven million, seven hundred eighty-six thousand, nine hundred sixty-four".