64217315244 has 24 divisors (see below), whose sum is σ = 158654544048. Its totient is φ = 20146608640.

The previous prime is 64217315231. The next prime is 64217315293. The reversal of 64217315244 is 44251371246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157395177 + ... + 157395584.

It is an arithmetic number, because the mean of its divisors is an integer number (6610606002).

Almost surely, 2^64217315244 is an apocalyptic number.

It is an amenable number.

64217315244 is an abundant number, since it is smaller than the sum of its proper divisors (94437228804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64217315244 is a wasteful number, since it uses less digits than its factorization.

64217315244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314790785 (or 314790783 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The spelling of 64217315244 in words is "sixty-four billion, two hundred seventeen million, three hundred fifteen thousand, two hundred forty-four".