31136745736 has 16 divisors (see below), whose sum is σ = 58520077740. Its totient is φ = 15531391680.

The previous prime is 31136745733. The next prime is 31136745779. The reversal of 31136745736 is 63754763113.

It can be written as a sum of positive squares in 2 ways, for example, as 27254708100 + 3882037636 = 165090^2 + 62306^2 .

It is not an unprimeable number, because it can be changed into a prime (31136745733) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4619071 + ... + 4625806.

Almost surely, 2^31136745736 is an apocalyptic number.

It is an amenable number.

31136745736 is a deficient number, since it is larger than the sum of its proper divisors (27383332004).

31136745736 is a wasteful number, since it uses less digits than its factorization.

31136745736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9245304 (or 9245300 counting only the distinct ones).

The product of its digits is 952560, while the sum is 46.

The spelling of 31136745736 in words is "thirty-one billion, one hundred thirty-six million, seven hundred forty-five thousand, seven hundred thirty-six".