64740349651759 has 2 divisors, whose sum is σ = 64740349651760. Its totient is φ = 64740349651758.

The previous prime is 64740349651667. The next prime is 64740349651771. The reversal of 64740349651759 is 95715694304746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64740349651759 - 2²³ = 64740341263151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64740349651559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32370174825879 + 32370174825880.

It is an arithmetic number, because the mean of its divisors is an integer number (32370174825880).

Almost surely, 2^{64740349651759} is an apocalyptic number.

64740349651759 is a deficient number, since it is larger than the sum of its proper divisors (1).

64740349651759 is an equidigital number, since it uses as much as digits as its factorization.

64740349651759 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 685843200, while the sum is 70.

The spelling of 64740349651759 in words is "sixty-four trillion, seven hundred forty billion, three hundred forty-nine million, six hundred fifty-one thousand, seven hundred fifty-nine".