64180606618697 has 2 divisors, whose sum is σ = 64180606618698. Its totient is φ = 64180606618696.

The previous prime is 64180606618627. The next prime is 64180606618741. The reversal of 64180606618697 is 79681660608146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61920909192256 + 2259697426441 = 7868984^2 + 1503229^2 .

It is a cyclic number.

It is not a de Polignac number, because 64180606618697 - 2⁸ = 64180606618441 is a prime.

It is not a weakly prime, because it can be changed into another prime (64180606618627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32090303309348 + 32090303309349.

It is an arithmetic number, because the mean of its divisors is an integer number (32090303309349).

Almost surely, 2^{64180606618697} is an apocalyptic number.

It is an amenable number.

64180606618697 is a deficient number, since it is larger than the sum of its proper divisors (1).

64180606618697 is an equidigital number, since it uses as much as digits as its factorization.

64180606618697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125411328, while the sum is 68.

The spelling of 64180606618697 in words is "sixty-four trillion, one hundred eighty billion, six hundred six million, six hundred eighteen thousand, six hundred ninety-seven".