638582632810 has 32 divisors (see below), whose sum is σ = 1151762976000. Its totient is φ = 254919075840.

The previous prime is 638582632801. The next prime is 638582632843. The reversal of 638582632810 is 18236285836.

It is a super-2 number, since 2×638582632810² (a number of 24 digits) contains 22 as substring.

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, 19097386 + ... + 19130794.

It is an arithmetic number, because the mean of its divisors is an integer number (35992593000).

Almost surely, 2^638582632810 is an apocalyptic number.

638582632810 is a deficient number, since it is larger than the sum of its proper divisors (513180343190).

638582632810 is a wasteful number, since it uses less digits than its factorization.

638582632810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37206.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 638582632810 in words is "six hundred thirty-eight billion, five hundred eighty-two million, six hundred thirty-two thousand, eight hundred ten".