65440764629 has 2 divisors, whose sum is σ = 65440764630. Its totient is φ = 65440764628.

The previous prime is 65440764577. The next prime is 65440764659. The reversal of 65440764629 is 92646704456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54801873604 + 10638891025 = 234098^2 + 103145^2 .

It is a cyclic number.

It is not a de Polignac number, because 65440764629 - 2²⁴ = 65423987413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65440764659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32720382314 + 32720382315.

It is an arithmetic number, because the mean of its divisors is an integer number (32720382315).

Almost surely, 2^65440764629 is an apocalyptic number.

It is an amenable number.

65440764629 is a deficient number, since it is larger than the sum of its proper divisors (1).

65440764629 is an equidigital number, since it uses as much as digits as its factorization.

65440764629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 65440764629 in words is "sixty-five billion, four hundred forty million, seven hundred sixty-four thousand, six hundred twenty-nine".