31649690944 has 14 divisors (see below), whose sum is σ = 62804855594. Its totient is φ = 15824845440.

The previous prime is 31649690833. The next prime is 31649690953. The reversal of 31649690944 is 44909694613.

It can be written as a sum of positive squares in only one way, i.e., 26932748544 + 4716942400 = 164112^2 + 68680^2 .

It is a super-2 number, since 2×31649690944² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247263147 + ... + 247263274.

Almost surely, 2^31649690944 is an apocalyptic number.

It is an amenable number.

31649690944 is a deficient number, since it is larger than the sum of its proper divisors (31155164650).

31649690944 is an equidigital number, since it uses as much as digits as its factorization.

31649690944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494526433 (or 494526423 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 31649690944 in words is "thirty-one billion, six hundred forty-nine million, six hundred ninety thousand, nine hundred forty-four".