31172338468 has 24 divisors (see below), whose sum is σ = 56150986752. Its totient is φ = 15134422464.

The previous prime is 31172338459. The next prime is 31172338493. The reversal of 31172338468 is 86483327113.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628921 + ... + 676672.

It is an arithmetic number, because the mean of its divisors is an integer number (2339624448).

Almost surely, 2^31172338468 is an apocalyptic number.

It is an amenable number.

31172338468 is a deficient number, since it is larger than the sum of its proper divisors (24978648284).

31172338468 is a wasteful number, since it uses less digits than its factorization.

31172338468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305771 (or 1305769 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The spelling of 31172338468 in words is "thirty-one billion, one hundred seventy-two million, three hundred thirty-eight thousand, four hundred sixty-eight".