31374789165 has 48 divisors (see below), whose sum is σ = 54640038960. Its totient is φ = 16654325760.

The previous prime is 31374789157. The next prime is 31374789181. The reversal of 31374789165 is 56198747313.

31374789165 is a `hidden beast` number, since 3 + 1 + 3 + 7 + 478 + 9 + 165 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2232036 + 31372557129 = 1494^2 + 177123^2 .

It is not a de Polignac number, because 31374789165 - 2³ = 31374789157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9468549 + ... + 9471861.

It is an arithmetic number, because the mean of its divisors is an integer number (1138334145).

Almost surely, 2^31374789165 is an apocalyptic number.

It is an amenable number.

31374789165 is a deficient number, since it is larger than the sum of its proper divisors (23265249795).

31374789165 is a wasteful number, since it uses less digits than its factorization.

31374789165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254 (or 4251 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The spelling of 31374789165 in words is "thirty-one billion, three hundred seventy-four million, seven hundred eighty-nine thousand, one hundred sixty-five".