2564485169 has 2 divisors, whose sum is σ = 2564485170. Its totient is φ = 2564485168.

The previous prime is 2564485067. The next prime is 2564485247. The reversal of 2564485169 is 9615844652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1390394944 + 1174090225 = 37288^2 + 34265^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564485169 - 2⁸ = 2564484913 is a prime.

It is a super-2 number, since 2×2564485169² = 13153168364041917122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2564485369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282242584 + 1282242585.

It is an arithmetic number, because the mean of its divisors is an integer number (1282242585).

Almost surely, 2^2564485169 is an apocalyptic number.

It is an amenable number.

2564485169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564485169 is an equidigital number, since it uses as much as digits as its factorization.

2564485169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2073600, while the sum is 50.

The square root of 2564485169 is about 50640.7461339187. The cubic root of 2564485169 is about 1368.7792007170.

The spelling of 2564485169 in words is "two billion, five hundred sixty-four million, four hundred eighty-five thousand, one hundred sixty-nine".