123178945858128 has 120 divisors (see below), whose sum is σ = 345281602967808. Its totient is φ = 40993996720896.

The previous prime is 123178945858037. The next prime is 123178945858147. The reversal of 123178945858128 is 821858549871321.

123178945858128 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 78 + 9 + 458 + 5 + 81 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229561926 + ... + 230097882.

Almost surely, 2^{123178945858128} is an apocalyptic number.

123178945858128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

123178945858128 is an abundant number, since it is smaller than the sum of its proper divisors (222102657109680).

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

123178945858128 is a wasteful number, since it uses less digits than its factorization.

123178945858128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538521 (or 538512 counting only the distinct ones).

The product of its digits is 309657600, while the sum is 72.

The spelling of 123178945858128 in words is "one hundred twenty-three trillion, one hundred seventy-eight billion, nine hundred forty-five million, eight hundred fifty-eight thousand, one hundred twenty-eight".