30640732520 has 32 divisors (see below), whose sum is σ = 69610993920. Its totient is φ = 12137298240.

The previous prime is 30640732487. The next prime is 30640732531. The reversal of 30640732520 is 2523704603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3714416 + ... + 3722655.

It is an arithmetic number, because the mean of its divisors is an integer number (2175343560).

Almost surely, 2^30640732520 is an apocalyptic number.

It is an amenable number.

30640732520 is an abundant number, since it is smaller than the sum of its proper divisors (38970261400).

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

30640732520 is a wasteful number, since it uses less digits than its factorization.

30640732520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437185 (or 7437181 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The spelling of 30640732520 in words is "thirty billion, six hundred forty million, seven hundred thirty-two thousand, five hundred twenty".