255575895021 has 24 divisors (see below), whose sum is σ = 370741862400. Its totient is φ = 169657708896.

The previous prime is 255575895011. The next prime is 255575895083. The reversal of 255575895021 is 120598575552.

255575895021 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 7 + 589 + 50 + 2 + 1 = 666.

It is not a de Polignac number, because 255575895021 - 2⁶ = 255575894957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255575895011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2031255 + ... + 2153403.

It is an arithmetic number, because the mean of its divisors is an integer number (15447577600).

Almost surely, 2^255575895021 is an apocalyptic number.

It is an amenable number.

255575895021 is a deficient number, since it is larger than the sum of its proper divisors (115165967379).

255575895021 is a wasteful number, since it uses less digits than its factorization.

255575895021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123145 (or 123142 counting only the distinct ones).

The product of its (nonzero) digits is 6300000, while the sum is 54.

The spelling of 255575895021 in words is "two hundred fifty-five billion, five hundred seventy-five million, eight hundred ninety-five thousand, twenty-one".