64556369 has 2 divisors, whose sum is σ = 64556370. Its totient is φ = 64556368.

The previous prime is 64556363. The next prime is 64556389. The reversal of 64556369 is 96365546.

64556369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 748225 = 7988^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 64556369 - 2⁸ = 64556113 is a prime.

It is a super-2 number, since 2×64556369² = 8335049556928322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64556363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32278184 + 32278185.

It is an arithmetic number, because the mean of its divisors is an integer number (32278185).

Almost surely, 2^64556369 is an apocalyptic number.

It is an amenable number.

64556369 is a deficient number, since it is larger than the sum of its proper divisors (1).

64556369 is an equidigital number, since it uses as much as digits as its factorization.

64556369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 44.

The square root of 64556369 is about 8034.6978163463. The cubic root of 64556369 is about 401.1557594174.

The spelling of 64556369 in words is "sixty-four million, five hundred fifty-six thousand, three hundred sixty-nine".