30991641036 has 48 divisors (see below), whose sum is σ = 79037521920. Its totient is φ = 9409224960.

The previous prime is 30991640983. The next prime is 30991641047. The reversal of 30991641036 is 63014619903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2443996 + ... + 2456643.

It is an arithmetic number, because the mean of its divisors is an integer number (1646615040).

Almost surely, 2^30991641036 is an apocalyptic number.

It is an amenable number.

30991641036 is an abundant number, since it is smaller than the sum of its proper divisors (48045880884).

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

30991641036 is a wasteful number, since it uses less digits than its factorization.

30991641036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900694 (or 4900692 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The spelling of 30991641036 in words is "thirty billion, nine hundred ninety-one million, six hundred forty-one thousand, thirty-six".