64993755064 has 64 divisors (see below), whose sum is σ = 145247477760. Its totient is φ = 26677969920.

The previous prime is 64993755061. The next prime is 64993755089. The reversal of 64993755064 is 46055739946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64993755061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24592 + ... + 361375.

It is an arithmetic number, because the mean of its divisors is an integer number (2269491840).

Almost surely, 2^64993755064 is an apocalyptic number.

It is an amenable number.

64993755064 is an abundant number, since it is smaller than the sum of its proper divisors (80253722696).

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

64993755064 is a wasteful number, since it uses less digits than its factorization.

64993755064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386108 (or 386104 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 58.

The spelling of 64993755064 in words is "sixty-four billion, nine hundred ninety-three million, seven hundred fifty-five thousand, sixty-four".