125023663979 has 32 divisors (see below), whose sum is σ = 135213081600. Its totient is φ = 115548267744.

The previous prime is 125023663939. The next prime is 125023663991. The reversal of 125023663979 is 979366320521.

It is a de Polignac number, because none of the positive numbers 2^k-125023663979 is a prime.

It is a super-2 number, since 2×125023663979² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125023663979.

It is not an unprimeable number, because it can be changed into a prime (125023663939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176337677 + ... + 176338385.

It is an arithmetic number, because the mean of its divisors is an integer number (4225408800).

Almost surely, 2^125023663979 is an apocalyptic number.

125023663979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

125023663979 is a deficient number, since it is larger than the sum of its proper divisors (10189417621).

125023663979 is an frugal number, since it uses more digits than its factorization.

125023663979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360 (or 1322 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 53.

The spelling of 125023663979 in words is "one hundred twenty-five billion, twenty-three million, six hundred sixty-three thousand, nine hundred seventy-nine".