64031137568 has 96 divisors (see below), whose sum is σ = 142482291840. Its totient is φ = 28144005120.

The previous prime is 64031137543. The next prime is 64031137613. The reversal of 64031137568 is 86573113046.

64031137568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690230 + ... + 777482.

It is an arithmetic number, because the mean of its divisors is an integer number (1484190540).

Almost surely, 2^64031137568 is an apocalyptic number.

64031137568 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64031137568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71241145920).

64031137568 is an abundant number, since it is smaller than the sum of its proper divisors (78451154272).

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

64031137568 is a wasteful number, since it uses less digits than its factorization.

64031137568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87370 (or 87362 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 64031137568 in words is "sixty-four billion, thirty-one million, one hundred thirty-seven thousand, five hundred sixty-eight".