31144755856 has 20 divisors (see below), whose sum is σ = 60655628332. Its totient is φ = 15491690496.

The previous prime is 31144755823. The next prime is 31144755869. The reversal of 31144755856 is 65855744113.

It can be written as a sum of positive squares in 2 ways, for example, as 4745005456 + 26399750400 = 68884^2 + 162480^2 .

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, 5039781 + ... + 5045956.

Almost surely, 2^31144755856 is an apocalyptic number.

It is an amenable number.

31144755856 is a deficient number, since it is larger than the sum of its proper divisors (29510872476).

31144755856 is a wasteful number, since it uses less digits than its factorization.

31144755856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10085938 (or 10085932 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 49.

The spelling of 31144755856 in words is "thirty-one billion, one hundred forty-four million, seven hundred fifty-five thousand, eight hundred fifty-six".