125585579638 has 32 divisors (see below), whose sum is σ = 196748782272. Its totient is φ = 60072307200.

The previous prime is 125585579591. The next prime is 125585579683. The reversal of 125585579638 is 836975585521.

It is a super-2 number, since 2×125585579638² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125585579638.

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, 974943 + ... + 1096213.

It is an arithmetic number, because the mean of its divisors is an integer number (6148399446).

Almost surely, 2^125585579638 is an apocalyptic number.

125585579638 is a deficient number, since it is larger than the sum of its proper divisors (71163202634).

125585579638 is a wasteful number, since it uses less digits than its factorization.

125585579638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121560.

The product of its digits is 90720000, while the sum is 64.

The spelling of 125585579638 in words is "one hundred twenty-five billion, five hundred eighty-five million, five hundred seventy-nine thousand, six hundred thirty-eight".