125256120256 has 28 divisors (see below), whose sum is σ = 259361860752. Its totient is φ = 59905100288.

The previous prime is 125256120229. The next prime is 125256120271. The reversal of 125256120256 is 652021652521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42544765 + ... + 42547708.

Almost surely, 2^125256120256 is an apocalyptic number.

125256120256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

125256120256 is an abundant number, since it is smaller than the sum of its proper divisors (134105740496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125256120256 is an equidigital number, since it uses as much as digits as its factorization.

125256120256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85092508 (or 85092498 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 125256120256 its reverse (652021652521), we get a palindrome (777277772777).

The spelling of 125256120256 in words is "one hundred twenty-five billion, two hundred fifty-six million, one hundred twenty thousand, two hundred fifty-six".