256122255125 has 64 divisors (see below), whose sum is σ = 351686140416. Its totient is φ = 184680000000.

The previous prime is 256122255097. The next prime is 256122255127. The reversal of 256122255125 is 521552221652.

It is not a de Polignac number, because 256122255125 - 2²⁴ = 256105477909 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256122255127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158001815 + ... + 158003435.

It is an arithmetic number, because the mean of its divisors is an integer number (5495095944).

Almost surely, 2^256122255125 is an apocalyptic number.

256122255125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256122255125 is a deficient number, since it is larger than the sum of its proper divisors (95563885291).

256122255125 is a wasteful number, since it uses less digits than its factorization.

256122255125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559 (or 2549 counting only the distinct ones).

The product of its digits is 120000, while the sum is 38.

Adding to 256122255125 its reverse (521552221652), we get a palindrome (777674476777).

The spelling of 256122255125 in words is "two hundred fifty-six billion, one hundred twenty-two million, two hundred fifty-five thousand, one hundred twenty-five".