255351216564 has 36 divisors (see below), whose sum is σ = 645493536324. Its totient is φ = 85114117632.

The previous prime is 255351216553. The next prime is 255351216581. The reversal of 255351216564 is 465612153552.

255351216564 is a `hidden beast` number, since 2 + 55 + 35 + 1 + 2 + 1 + 6 + 564 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 117827427600 + 137523788964 = 343260^2 + 370842^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1092964 + ... + 1305860.

It is an arithmetic number, because the mean of its divisors is an integer number (17930376009).

Almost surely, 2^255351216564 is an apocalyptic number.

It is an amenable number.

255351216564 is an abundant number, since it is smaller than the sum of its proper divisors (390142319760).

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

255351216564 is a wasteful number, since it uses less digits than its factorization.

255351216564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246224 (or 246219 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The spelling of 255351216564 in words is "two hundred fifty-five billion, three hundred fifty-one million, two hundred sixteen thousand, five hundred sixty-four".