31139077268 has 12 divisors (see below), whose sum is σ = 58685184180. Its totient is φ = 14371881792.

The previous prime is 31139077237. The next prime is 31139077301. The reversal of 31139077268 is 86277093113.

It can be written as a sum of positive squares in 2 ways, for example, as 8611468804 + 22527608464 = 92798^2 + 150092^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299414153 + ... + 299414256.

It is an arithmetic number, because the mean of its divisors is an integer number (4890432015).

Almost surely, 2^31139077268 is an apocalyptic number.

It is an amenable number.

31139077268 is a deficient number, since it is larger than the sum of its proper divisors (27546106912).

31139077268 is a wasteful number, since it uses less digits than its factorization.

31139077268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598828426 (or 598828424 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 31139077268 in words is "thirty-one billion, one hundred thirty-nine million, seventy-seven thousand, two hundred sixty-eight".