30561638648 has 32 divisors (see below), whose sum is σ = 57958901760. Its totient is φ = 15106785120.

The previous prime is 30561638617. The next prime is 30561638663. The reversal of 30561638648 is 84683616503.

It is a junction number, because it is equal to n+sod(n) for n = 30561638596 and 30561638605.

It is a congruent number.

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, 234383 + ... + 340673.

It is an arithmetic number, because the mean of its divisors is an integer number (1811215680).

Almost surely, 2^30561638648 is an apocalyptic number.

It is an amenable number.

30561638648 is a deficient number, since it is larger than the sum of its proper divisors (27397263112).

30561638648 is a wasteful number, since it uses less digits than its factorization.

30561638648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106707 (or 106703 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 30561638648 in words is "thirty billion, five hundred sixty-one million, six hundred thirty-eight thousand, six hundred forty-eight".