123977031775 has 24 divisors (see below), whose sum is σ = 163491745680. Its totient is φ = 92936117760.

The previous prime is 123977031733. The next prime is 123977031797. The reversal of 123977031775 is 577130779321.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-123977031775 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, 546060 + ... + 739009.

It is an arithmetic number, because the mean of its divisors is an integer number (6812156070).

Almost surely, 2^123977031775 is an apocalyptic number.

123977031775 is a deficient number, since it is larger than the sum of its proper divisors (39514713905).

123977031775 is a wasteful number, since it uses less digits than its factorization.

123977031775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285323 (or 1285318 counting only the distinct ones).

The product of its (nonzero) digits is 1944810, while the sum is 52.

The spelling of 123977031775 in words is "one hundred twenty-three billion, nine hundred seventy-seven million, thirty-one thousand, seven hundred seventy-five".