125621116401415 has 16 divisors (see below), whose sum is σ = 157035689775360. Its totient is φ = 96362809608960.

The previous prime is 125621116401379. The next prime is 125621116401427. The reversal of 125621116401415 is 514104611126521.

It is not a de Polignac number, because 125621116401415 - 2²⁵ = 125621082846983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3717684094 + ... + 3717717883.

It is an arithmetic number, because the mean of its divisors is an integer number (9814730610960).

Almost surely, 2^{125621116401415} is an apocalyptic number.

125621116401415 is a deficient number, since it is larger than the sum of its proper divisors (31414573373945).

125621116401415 is a wasteful number, since it uses less digits than its factorization.

125621116401415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7435402122.

The product of its (nonzero) digits is 57600, while the sum is 40.

Adding to 125621116401415 its reverse (514104611126521), we get a palindrome (639725727527936).

The spelling of 125621116401415 in words is "one hundred twenty-five trillion, six hundred twenty-one billion, one hundred sixteen million, four hundred one thousand, four hundred fifteen".