64775568432959 has 8 divisors (see below), whose sum is σ = 66390774666720. Its totient is φ = 63162043833600.

The previous prime is 64775568432947. The next prime is 64775568432961. The reversal of 64775568432959 is 95923486557746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64775568432959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64775568432919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420330602 + ... + 420484679.

It is an arithmetic number, because the mean of its divisors is an integer number (8298846833340).

Almost surely, 2^{64775568432959} is an apocalyptic number.

64775568432959 is a deficient number, since it is larger than the sum of its proper divisors (1615206233761).

64775568432959 is a wasteful number, since it uses less digits than its factorization.

64775568432959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840817201.

The product of its digits is 13716864000, while the sum is 80.

The spelling of 64775568432959 in words is "sixty-four trillion, seven hundred seventy-five billion, five hundred sixty-eight million, four hundred thirty-two thousand, nine hundred fifty-nine".