123187857904 has 20 divisors (see below), whose sum is σ = 238892897376. Its totient is φ = 61538077952.

The previous prime is 123187857893. The next prime is 123187857973. The reversal of 123187857904 is 409758781321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3472489 + ... + 3507784.

Almost surely, 2^123187857904 is an apocalyptic number.

It is an amenable number.

123187857904 is a deficient number, since it is larger than the sum of its proper divisors (115705039472).

123187857904 is a wasteful number, since it uses less digits than its factorization.

123187857904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6981384 (or 6981378 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 123187857904 in words is "one hundred twenty-three billion, one hundred eighty-seven million, eight hundred fifty-seven thousand, nine hundred four".