638414974830 has 64 divisors (see below), whose sum is σ = 1533904501248. Its totient is φ = 170054290560.

The previous prime is 638414974819. The next prime is 638414974843. The reversal of 638414974830 is 38479414836.

638414974830 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161744917 + ... + 161748863.

It is an arithmetic number, because the mean of its divisors is an integer number (23967257832).

Almost surely, 2^638414974830 is an apocalyptic number.

638414974830 is an abundant number, since it is smaller than the sum of its proper divisors (895489526418).

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

638414974830 is a wasteful number, since it uses less digits than its factorization.

638414974830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8601.

The product of its (nonzero) digits is 13934592, while the sum is 57.

The spelling of 638414974830 in words is "six hundred thirty-eight billion, four hundred fourteen million, nine hundred seventy-four thousand, eight hundred thirty".