64099123817 has 2 divisors, whose sum is σ = 64099123818. Its totient is φ = 64099123816.

The previous prime is 64099123799. The next prime is 64099123927. The reversal of 64099123817 is 71832199046.

64099123817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59934873856 + 4164249961 = 244816^2 + 64531^2 .

It is a cyclic number.

It is not a de Polignac number, because 64099123817 - 2³² = 59804156521 is a prime.

It is not a weakly prime, because it can be changed into another prime (64099120817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32049561908 + 32049561909.

It is an arithmetic number, because the mean of its divisors is an integer number (32049561909).

Almost surely, 2^64099123817 is an apocalyptic number.

It is an amenable number.

64099123817 is a deficient number, since it is larger than the sum of its proper divisors (1).

64099123817 is an equidigital number, since it uses as much as digits as its factorization.

64099123817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 64099123817 in words is "sixty-four billion, ninety-nine million, one hundred twenty-three thousand, eight hundred seventeen".