64494591769 has 2 divisors, whose sum is σ = 64494591770. Its totient is φ = 64494591768.

The previous prime is 64494591757. The next prime is 64494591787. The reversal of 64494591769 is 96719549446.

64494591769 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., 34591536144 + 29903055625 = 185988^2 + 172925^2 .

It is a cyclic number.

It is not a de Polignac number, because 64494591769 - 2¹³ = 64494583577 is a prime.

It is a super-2 number, since 2×64494591769² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64494591769.

It is not a weakly prime, because it can be changed into another prime (64494591739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32247295884 + 32247295885.

It is an arithmetic number, because the mean of its divisors is an integer number (32247295885).

Almost surely, 2^64494591769 is an apocalyptic number.

It is an amenable number.

64494591769 is a deficient number, since it is larger than the sum of its proper divisors (1).

64494591769 is an equidigital number, since it uses as much as digits as its factorization.

64494591769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 64.

The spelling of 64494591769 in words is "sixty-four billion, four hundred ninety-four million, five hundred ninety-one thousand, seven hundred sixty-nine".