564250861 has 2 divisors, whose sum is σ = 564250862. Its totient is φ = 564250860.

The previous prime is 564250853. The next prime is 564250867. The reversal of 564250861 is 168052465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471975625 + 92275236 = 21725^2 + 9606^2 .

It is a cyclic number.

It is not a de Polignac number, because 564250861 - 2³ = 564250853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 564250861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564250867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282125430 + 282125431.

It is an arithmetic number, because the mean of its divisors is an integer number (282125431).

Almost surely, 2^564250861 is an apocalyptic number.

It is an amenable number.

564250861 is a deficient number, since it is larger than the sum of its proper divisors (1).

564250861 is an equidigital number, since it uses as much as digits as its factorization.

564250861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 564250861 is about 23753.9651637363. The cubic root of 564250861 is about 826.3374015143.

The spelling of 564250861 in words is "five hundred sixty-four million, two hundred fifty thousand, eight hundred sixty-one".