638615372374 has 32 divisors (see below), whose sum is σ = 1112958798336. Its totient is φ = 269158507200.

The previous prime is 638615372357. The next prime is 638615372387. The reversal of 638615372374 is 473273516836.

It is a congruent number.

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, 2674 + ... + 1130149.

It is an arithmetic number, because the mean of its divisors is an integer number (34779962448).

Almost surely, 2^638615372374 is an apocalyptic number.

638615372374 is a deficient number, since it is larger than the sum of its proper divisors (474343425962).

638615372374 is a wasteful number, since it uses less digits than its factorization.

638615372374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133500.

The product of its digits is 15240960, while the sum is 55.

The spelling of 638615372374 in words is "six hundred thirty-eight billion, six hundred fifteen million, three hundred seventy-two thousand, three hundred seventy-four".