64337025563917 has 2 divisors, whose sum is σ = 64337025563918. Its totient is φ = 64337025563916.

The previous prime is 64337025563869. The next prime is 64337025563939. The reversal of 64337025563917 is 71936552073346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43737509272356 + 20599516291561 = 6613434^2 + 4538669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64337025563917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64337025563117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32168512781958 + 32168512781959.

It is an arithmetic number, because the mean of its divisors is an integer number (32168512781959).

Almost surely, 2^{64337025563917} is an apocalyptic number.

It is an amenable number.

64337025563917 is a deficient number, since it is larger than the sum of its proper divisors (1).

64337025563917 is an equidigital number, since it uses as much as digits as its factorization.

64337025563917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85730400, while the sum is 61.

The spelling of 64337025563917 in words is "sixty-four trillion, three hundred thirty-seven billion, twenty-five million, five hundred sixty-three thousand, nine hundred seventeen".