123721746255725 has 24 divisors (see below), whose sum is σ = 154696110898560. Its totient is φ = 98154288288000.

The previous prime is 123721746255673. The next prime is 123721746255799. The reversal of 123721746255725 is 527552647127321.

It is a happy number.

It is not a de Polignac number, because 123721746255725 - 2³⁰ = 123720672513901 is a prime.

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, 41519711 + ... + 44399660.

It is an arithmetic number, because the mean of its divisors is an integer number (6445671287440).

Almost surely, 2^{123721746255725} is an apocalyptic number.

It is an amenable number.

123721746255725 is a deficient number, since it is larger than the sum of its proper divisors (30974364642835).

123721746255725 is a wasteful number, since it uses less digits than its factorization.

123721746255725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85919861 (or 85919856 counting only the distinct ones).

The product of its digits is 49392000, while the sum is 59.

The spelling of 123721746255725 in words is "one hundred twenty-three trillion, seven hundred twenty-one billion, seven hundred forty-six million, two hundred fifty-five thousand, seven hundred twenty-five".