125542635867265 has 8 divisors (see below), whose sum is σ = 150651225802728. Its totient is φ = 100434066852480.

The previous prime is 125542635867227. The next prime is 125542635867317. The reversal of 125542635867265 is 562768536245521.

It can be written as a sum of positive squares in 4 ways, for example, as 50796167342449 + 74746468524816 = 7127143^2 + 8645604^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125542635867265 - 2³⁵ = 125508276128897 is a prime.

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 125542635867265.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15292869 + ... + 22021741.

It is an arithmetic number, because the mean of its divisors is an integer number (18831403225341).

Almost surely, 2^{125542635867265} is an apocalyptic number.

It is an amenable number.

125542635867265 is a deficient number, since it is larger than the sum of its proper divisors (25108589935463).

125542635867265 is an equidigital number, since it uses as much as digits as its factorization.

125542635867265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10460339.

The product of its digits is 725760000, while the sum is 67.

The spelling of 125542635867265 in words is "one hundred twenty-five trillion, five hundred forty-two billion, six hundred thirty-five million, eight hundred sixty-seven thousand, two hundred sixty-five".