564621255 has 96 divisors (see below), whose sum is σ = 1139261760. Its totient is φ = 255651840.

The previous prime is 564621241. The next prime is 564621257. The reversal of 564621255 is 552126465.

564621255 is a `hidden beast` number, since 5 + 6 + 4 + 621 + 25 + 5 = 666.

It is not a de Polignac number, because 564621255 - 2⁶ = 564621191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564621257) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1926889 + ... + 1927181.

It is an arithmetic number, because the mean of its divisors is an integer number (11867310).

Almost surely, 2^564621255 is an apocalyptic number.

564621255 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

564621255 is an abundant number, since it is smaller than the sum of its proper divisors (574640505).

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

564621255 is a wasteful number, since it uses less digits than its factorization.

564621255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 558 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 564621255 is about 23761.7603514554. The cubic root of 564621255 is about 826.5181742221.

The spelling of 564621255 in words is "five hundred sixty-four million, six hundred twenty-one thousand, two hundred fifty-five".