31556680164 has 135 divisors (see below), whose sum is σ = 84279966771. Its totient is φ = 10296130320.

The previous prime is 31556680159. The next prime is 31556680189. The reversal of 31556680164 is 46108665513.

The square root of 31556680164 is 177642.

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

31556680164 is a `hidden beast` number, since 3 + 1 + 5 + 566 + 80 + 1 + 6 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 227026407 + ... + 227026545.

Almost surely, 2^31556680164 is an apocalyptic number.

31556680164 is the 177642-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31556680164

31556680164 is an abundant number, since it is smaller than the sum of its proper divisors (52723286607).

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

31556680164 is an equidigital number, since it uses as much as digits as its factorization.

31556680164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 31556680164 in words is "thirty-one billion, five hundred fifty-six million, six hundred eighty thousand, one hundred sixty-four".