31455860164 has 27 divisors (see below), whose sum is σ = 55878734541. Its totient is φ = 15493994880.

The previous prime is 31455860147. The next prime is 31455860173. The reversal of 31455860164 is 46106855413.

The square root of 31455860164 is 177358.

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

It can be written as a sum of positive squares in only one way, i.e., 12872717764 + 18583142400 = 113458^2 + 136320^2 .

It is a super-2 number, since 2×31455860164² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31455860164.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25184212 + ... + 25185460.

Almost surely, 2^31455860164 is an apocalyptic number.

31455860164 is the 177358-th square number.

It is an amenable number.

31455860164 is a deficient number, since it is larger than the sum of its proper divisors (24422874377).

31455860164 is an frugal number, since it uses more digits than its factorization.

31455860164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644 (or 1322 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 31455860164 in words is "thirty-one billion, four hundred fifty-five million, eight hundred sixty thousand, one hundred sixty-four".