31612728064 has 18 divisors (see below), whose sum is σ = 63101969420. Its totient is φ = 15806363904.

The previous prime is 31612728011. The next prime is 31612728073. The reversal of 31612728064 is 46082721613.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61743354 + ... + 61743865.

Almost surely, 2^31612728064 is an apocalyptic number.

It is an amenable number.

31612728064 is a deficient number, since it is larger than the sum of its proper divisors (31489241356).

31612728064 is an equidigital number, since it uses as much as digits as its factorization.

31612728064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123487235 (or 123487221 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 31612728064 in words is "thirty-one billion, six hundred twelve million, seven hundred twenty-eight thousand, sixty-four".