255961207872 has 98 divisors (see below), whose sum is σ = 761536301918. Its totient is φ = 85320387072.

The previous prime is 255961207819. The next prime is 255961207877. The reversal of 255961207872 is 278702169552.

255961207872 is a `hidden beast` number, since 2 + 559 + 6 + 1 + 2 + 0 + 7 + 87 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 254596939776 + 1364268096 = 504576^2 + 36936^2 .

It is a super-2 number, since 2×255961207872² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (255961207877) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2696413 + ... + 2789724.

It is an arithmetic number, because the mean of its divisors is an integer number (7770778591).

Almost surely, 2^255961207872 is an apocalyptic number.

It is an amenable number.

255961207872 is an abundant number, since it is smaller than the sum of its proper divisors (505575094046).

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

255961207872 is an frugal number, since it uses more digits than its factorization.

255961207872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486167 (or 5486142 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 255961207872 in words is "two hundred fifty-five billion, nine hundred sixty-one million, two hundred seven thousand, eight hundred seventy-two".