64815338663 has 2 divisors, whose sum is σ = 64815338664. Its totient is φ = 64815338662.

The previous prime is 64815338659. The next prime is 64815338713. The reversal of 64815338663 is 36683351846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64815338663 - 2² = 64815338659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64815332663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32407669331 + 32407669332.

It is an arithmetic number, because the mean of its divisors is an integer number (32407669332).

Almost surely, 2^64815338663 is an apocalyptic number.

64815338663 is a deficient number, since it is larger than the sum of its proper divisors (1).

64815338663 is an equidigital number, since it uses as much as digits as its factorization.

64815338663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 53.

The spelling of 64815338663 in words is "sixty-four billion, eight hundred fifteen million, three hundred thirty-eight thousand, six hundred sixty-three".