64001569 has 2 divisors, whose sum is σ = 64001570. Its totient is φ = 64001568.

The previous prime is 64001551. The next prime is 64001593. The reversal of 64001569 is 96510046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56776225 + 7225344 = 7535^2 + 2688^2 .

It is a cyclic number.

It is not a de Polignac number, because 64001569 - 2⁵ = 64001537 is a prime.

It is a super-2 number, since 2×64001569² = 8192401668923522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64001569.

It is not a weakly prime, because it can be changed into another prime (64001599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32000784 + 32000785.

It is an arithmetic number, because the mean of its divisors is an integer number (32000785).

Almost surely, 2^64001569 is an apocalyptic number.

It is an amenable number.

64001569 is a deficient number, since it is larger than the sum of its proper divisors (1).

64001569 is an equidigital number, since it uses as much as digits as its factorization.

64001569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 64001569 is about 8000.0980618990. The cubic root of 64001569 is about 400.0032687233.

The spelling of 64001569 in words is "sixty-four million, one thousand, five hundred sixty-nine".