255657426626455 has 64 divisors (see below), whose sum is σ = 352448187494400. Its totient is φ = 174393999267840.

The previous prime is 255657426626453. The next prime is 255657426626471. The reversal of 255657426626455 is 554626624756552.

It is a happy number.

It is not a de Polignac number, because 255657426626455 - 2¹ = 255657426626453 is a prime.

It is a super-2 number, since 2×255657426626455² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255657426626453) 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, 18772107636 + ... + 18772121254.

It is an arithmetic number, because the mean of its divisors is an integer number (5507002929600).

Almost surely, 2^{255657426626455} is an apocalyptic number.

255657426626455 is a deficient number, since it is larger than the sum of its proper divisors (96790760867945).

255657426626455 is a wasteful number, since it uses less digits than its factorization.

255657426626455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16784.

The product of its digits is 3628800000, while the sum is 70.

The spelling of 255657426626455 in words is "two hundred fifty-five trillion, six hundred fifty-seven billion, four hundred twenty-six million, six hundred twenty-six thousand, four hundred fifty-five".