123957138194 has 16 divisors (see below), whose sum is σ = 191173602816. Its totient is φ = 60243760800.

The previous prime is 123957138169. The next prime is 123957138211. The reversal of 123957138194 is 491831759321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2766842 + ... + 2811285.

It is an arithmetic number, because the mean of its divisors is an integer number (11948350176).

Almost surely, 2^123957138194 is an apocalyptic number.

123957138194 is a deficient number, since it is larger than the sum of its proper divisors (67216464622).

123957138194 is a wasteful number, since it uses less digits than its factorization.

123957138194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5578441.

The product of its digits is 1632960, while the sum is 53.

The spelling of 123957138194 in words is "one hundred twenty-three billion, nine hundred fifty-seven million, one hundred thirty-eight thousand, one hundred ninety-four".