64522457729 has 2 divisors, whose sum is σ = 64522457730. Its totient is φ = 64522457728.

The previous prime is 64522457723. The next prime is 64522457801. The reversal of 64522457729 is 92775422546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64508380225 + 14077504 = 253985^2 + 3752^2 .

It is a cyclic number.

It is not a de Polignac number, because 64522457729 - 2²⁴ = 64505680513 is a prime.

It is not a weakly prime, because it can be changed into another prime (64522457723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32261228864 + 32261228865.

It is an arithmetic number, because the mean of its divisors is an integer number (32261228865).

Almost surely, 2^64522457729 is an apocalyptic number.

It is an amenable number.

64522457729 is a deficient number, since it is larger than the sum of its proper divisors (1).

64522457729 is an equidigital number, since it uses as much as digits as its factorization.

64522457729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8467200, while the sum is 53.

The spelling of 64522457729 in words is "sixty-four billion, five hundred twenty-two million, four hundred fifty-seven thousand, seven hundred twenty-nine".