64602897257 has 2 divisors, whose sum is σ = 64602897258. Its totient is φ = 64602897256.

The previous prime is 64602897239. The next prime is 64602897301. The reversal of 64602897257 is 75279820646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64602897241 + 16 = 254171^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 64602897257 - 2²⁶ = 64535788393 is a prime.

It is a super-3 number, since 3×64602897257³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (64602896257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32301448628 + 32301448629.

It is an arithmetic number, because the mean of its divisors is an integer number (32301448629).

Almost surely, 2^64602897257 is an apocalyptic number.

It is an amenable number.

64602897257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64602897257 is an equidigital number, since it uses as much as digits as its factorization.

64602897257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 64602897257 in words is "sixty-four billion, six hundred two million, eight hundred ninety-seven thousand, two hundred fifty-seven".