64322569 has 2 divisors, whose sum is σ = 64322570. Its totient is φ = 64322568.

The previous prime is 64322561. The next prime is 64322591. The reversal of 64322569 is 96522346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57562569 + 6760000 = 7587^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 64322569 - 2³ = 64322561 is a prime.

It is a super-2 number, since 2×64322569² = 8274785765519522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64322561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32161284 + 32161285.

It is an arithmetic number, because the mean of its divisors is an integer number (32161285).

Almost surely, 2^64322569 is an apocalyptic number.

It is an amenable number.

64322569 is a deficient number, since it is larger than the sum of its proper divisors (1).

64322569 is an equidigital number, since it uses as much as digits as its factorization.

64322569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 37.

The square root of 64322569 is about 8020.1352232989. The cubic root of 64322569 is about 400.6708928778.

The spelling of 64322569 in words is "sixty-four million, three hundred twenty-two thousand, five hundred sixty-nine".