64204226657 has 2 divisors, whose sum is σ = 64204226658. Its totient is φ = 64204226656.

The previous prime is 64204226623. The next prime is 64204226687. The reversal of 64204226657 is 75662240246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58192395361 + 6011831296 = 241231^2 + 77536^2 .

It is a cyclic number.

It is not a de Polignac number, because 64204226657 - 2³⁴ = 47024357473 is a prime.

It is not a weakly prime, because it can be changed into another prime (64204226687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32102113328 + 32102113329.

It is an arithmetic number, because the mean of its divisors is an integer number (32102113329).

Almost surely, 2^64204226657 is an apocalyptic number.

It is an amenable number.

64204226657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64204226657 is an equidigital number, since it uses as much as digits as its factorization.

64204226657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 64204226657 in words is "sixty-four billion, two hundred four million, two hundred twenty-six thousand, six hundred fifty-seven".