255556339893 has 12 divisors (see below), whose sum is σ = 372523514220. Its totient is φ = 168807856896.

The previous prime is 255556339879. The next prime is 255556339957. The reversal of 255556339893 is 398933655552.

255556339893 is a `hidden beast` number, since 2 + 55 + 55 + 63 + 398 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 221809915089 + 33746424804 = 470967^2 + 183702^2 .

It is not a de Polignac number, because 255556339893 - 2⁴ = 255556339877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255556339893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255556339873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130251996 + ... + 130253957.

It is an arithmetic number, because the mean of its divisors is an integer number (31043626185).

Almost surely, 2^255556339893 is an apocalyptic number.

It is an amenable number.

255556339893 is a deficient number, since it is larger than the sum of its proper divisors (116967174327).

255556339893 is a wasteful number, since it uses less digits than its factorization.

255556339893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260506068 (or 260506065 counting only the distinct ones).

The product of its digits is 131220000, while the sum is 63.

The spelling of 255556339893 in words is "two hundred fifty-five billion, five hundred fifty-six million, three hundred thirty-nine thousand, eight hundred ninety-three".