31398537608 has 64 divisors (see below), whose sum is σ = 60012126720. Its totient is φ = 15399014400.

The previous prime is 31398537593. The next prime is 31398537637. The reversal of 31398537608 is 80673589313.

It is a self number, because there is not a number n which added to its sum of digits gives 31398537608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67815185 + ... + 67815647.

It is an arithmetic number, because the mean of its divisors is an integer number (937689480).

Almost surely, 2^31398537608 is an apocalyptic number.

It is an amenable number.

31398537608 is a deficient number, since it is larger than the sum of its proper divisors (28613589112).

31398537608 is a wasteful number, since it uses less digits than its factorization.

31398537608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 31398537608 in words is "thirty-one billion, three hundred ninety-eight million, five hundred thirty-seven thousand, six hundred eight".