123725718517158 has 64 divisors (see below), whose sum is σ = 286425805881600. Its totient is φ = 39554039776320.

The previous prime is 123725718517139. The next prime is 123725718517201. The reversal of 123725718517158 is 851715817527321.

123725718517158 is a `hidden beast` number, since 1 + 2 + 3 + 7 + 2 + 57 + 18 + 517 + 1 + 58 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 123725718517095 and 123725718517104.

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, 473457016 + ... + 473718267.

It is an arithmetic number, because the mean of its divisors is an integer number (4475403216900).

Almost surely, 2^{123725718517158} is an apocalyptic number.

123725718517158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123725718517158 is an abundant number, since it is smaller than the sum of its proper divisors (162700087364442).

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

123725718517158 is a wasteful number, since it uses less digits than its factorization.

123725718517158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947175394 (or 947175388 counting only the distinct ones).

The product of its digits is 32928000, while the sum is 63.

The spelling of 123725718517158 in words is "one hundred twenty-three trillion, seven hundred twenty-five billion, seven hundred eighteen million, five hundred seventeen thousand, one hundred fifty-eight".