125792666297521 has 4 divisors (see below), whose sum is σ = 126034110955044. Its totient is φ = 125551221640000.

The previous prime is 125792666297497. The next prime is 125792666297527.

125792666297521 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21040798350625 + 104751867946896 = 4587025^2 + 10234836^2 .

It is a cyclic number.

It is not a de Polignac number, because 125792666297521 - 2³³ = 125784076362929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125792666297527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120722327980 + ... + 120722329021.

It is an arithmetic number, because the mean of its divisors is an integer number (31508527738761).

Almost surely, 2^{125792666297521} is an apocalyptic number.

It is an amenable number.

125792666297521 is a deficient number, since it is larger than the sum of its proper divisors (241444657523).

125792666297521 is an equidigital number, since it uses as much as digits as its factorization.

125792666297521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241444657522.

The product of its digits is 342921600, while the sum is 70.

The spelling of 125792666297521 in words is "one hundred twenty-five trillion, seven hundred ninety-two billion, six hundred sixty-six million, two hundred ninety-seven thousand, five hundred twenty-one".