638584677131 has 8 divisors (see below), whose sum is σ = 672215814720. Its totient is φ = 604955681352.

The previous prime is 638584677127. The next prime is 638584677179. The reversal of 638584677131 is 131776485836.

638584677131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 638584677131 - 2² = 638584677127 is a prime.

It is a super-2 number, since 2×638584677131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638584673131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95636 + ... + 1134158.

It is an arithmetic number, because the mean of its divisors is an integer number (84026976840).

Almost surely, 2^638584677131 is an apocalyptic number.

638584677131 is a deficient number, since it is larger than the sum of its proper divisors (33631137589).

638584677131 is a wasteful number, since it uses less digits than its factorization.

638584677131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070905.

The product of its digits is 20321280, while the sum is 59.

The spelling of 638584677131 in words is "six hundred thirty-eight billion, five hundred eighty-four million, six hundred seventy-seven thousand, one hundred thirty-one".