31664665152 has 84 divisors (see below), whose sum is σ = 94122611856. Its totient is φ = 10554883200.

The previous prime is 31664665147. The next prime is 31664665183. The reversal of 31664665152 is 25156646613.

31664665152 is a `hidden beast` number, since 3 + 16 + 64 + 66 + 515 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 31664665098 and 31664665107.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002474 + ... + 1033577.

It is an arithmetic number, because the mean of its divisors is an integer number (1120507284).

Almost surely, 2^31664665152 is an apocalyptic number.

31664665152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31664665152 is an abundant number, since it is smaller than the sum of its proper divisors (62457946704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31664665152 is an equidigital number, since it uses as much as digits as its factorization.

31664665152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036078 (or 2036056 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 31664665152 in words is "thirty-one billion, six hundred sixty-four million, six hundred sixty-five thousand, one hundred fifty-two".