64817385896 has 32 divisors (see below), whose sum is σ = 126695162880. Its totient is φ = 31052712000.

The previous prime is 64817385889. The next prime is 64817385907. The reversal of 64817385896 is 69858371846.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268816 + ... + 1318911.

It is an arithmetic number, because the mean of its divisors is an integer number (3959223840).

Almost surely, 2^64817385896 is an apocalyptic number.

It is an amenable number.

64817385896 is a deficient number, since it is larger than the sum of its proper divisors (61877776984).

64817385896 is a wasteful number, since it uses less digits than its factorization.

64817385896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587865 (or 2587861 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 65.

The spelling of 64817385896 in words is "sixty-four billion, eight hundred seventeen million, three hundred eighty-five thousand, eight hundred ninety-six".