125205552344513 has 4 divisors (see below), whose sum is σ = 128589486191700. Its totient is φ = 121821618497328.

The previous prime is 125205552344447. The next prime is 125205552344557. The reversal of 125205552344513 is 315443255502521.

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 81713861943184 + 43491690401329 = 9039572^2 + 6594823^2 .

It is a cyclic number.

It is not a de Polignac number, because 125205552344513 - 2²⁴ = 125205535567297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125205552394513) 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, 1691966923538 + ... + 1691966923611.

It is an arithmetic number, because the mean of its divisors is an integer number (32147371547925).

Almost surely, 2^{125205552344513} is an apocalyptic number.

It is an amenable number.

125205552344513 is a deficient number, since it is larger than the sum of its proper divisors (3383933847187).

125205552344513 is an equidigital number, since it uses as much as digits as its factorization.

125205552344513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383933847186.

The product of its (nonzero) digits is 3600000, while the sum is 47.

The spelling of 125205552344513 in words is "one hundred twenty-five trillion, two hundred five billion, five hundred fifty-two million, three hundred forty-four thousand, five hundred thirteen".