64216312568 has 16 divisors (see below), whose sum is σ = 120464265480. Its totient is φ = 32092508448.

The previous prime is 64216312553. The next prime is 64216312619. The reversal of 64216312568 is 86521361246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1938530 + ... + 1971377.

Almost surely, 2^64216312568 is an apocalyptic number.

It is an amenable number.

64216312568 is a deficient number, since it is larger than the sum of its proper divisors (56247952912).

64216312568 is a wasteful number, since it uses less digits than its factorization.

64216312568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911966 (or 3911962 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The spelling of 64216312568 in words is "sixty-four billion, two hundred sixteen million, three hundred twelve thousand, five hundred sixty-eight".