64615120529 has 2 divisors, whose sum is σ = 64615120530. Its totient is φ = 64615120528.

The previous prime is 64615120519. The next prime is 64615120573. The reversal of 64615120529 is 92502151646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54744300625 + 9870819904 = 233975^2 + 99352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64615120529 is a prime.

It is a super-2 number, since 2×64615120529² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64615120519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32307560264 + 32307560265.

It is an arithmetic number, because the mean of its divisors is an integer number (32307560265).

Almost surely, 2^64615120529 is an apocalyptic number.

It is an amenable number.

64615120529 is a deficient number, since it is larger than the sum of its proper divisors (1).

64615120529 is an equidigital number, since it uses as much as digits as its factorization.

64615120529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 64615120529 in words is "sixty-four billion, six hundred fifteen million, one hundred twenty thousand, five hundred twenty-nine".