185164974864 has 75 divisors (see below), whose sum is σ = 535965997413. Its totient is φ = 61716494592.

The previous prime is 185164974811. The next prime is 185164974871. The reversal of 185164974864 is 468479461581.

The square root of 185164974864 is 430308.

It is a perfect power (a square), and thus also a powerful number.

185164974864 is a `hidden beast` number, since 1 + 8 + 5 + 1 + 64 + 97 + 486 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 167690250000 + 17474724864 = 409500^2 + 132192^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 15485112 + ... + 15497064.

Almost surely, 2^185164974864 is an apocalyptic number.

185164974864 is the 430308-th square number.

It is an amenable number.

185164974864 is an abundant number, since it is smaller than the sum of its proper divisors (350801022549).

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

185164974864 is an frugal number, since it uses more digits than its factorization.

185164974864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23926 (or 11958 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 185164974864 in words is "one hundred eighty-five billion, one hundred sixty-four million, nine hundred seventy-four thousand, eight hundred sixty-four".