64332135868 has 72 divisors (see below), whose sum is σ = 153857343024. Its totient is φ = 23136422400.

The previous prime is 64332135821. The next prime is 64332135871. The reversal of 64332135868 is 86853123346.

It is a super-2 number, since 2×64332135868² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1119613 + ... + 1175668.

It is an arithmetic number, because the mean of its divisors is an integer number (2136907542).

Almost surely, 2^64332135868 is an apocalyptic number.

It is an amenable number.

64332135868 is an abundant number, since it is smaller than the sum of its proper divisors (89525207156).

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

64332135868 is a wasteful number, since it uses less digits than its factorization.

64332135868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295323 (or 2295314 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

The spelling of 64332135868 in words is "sixty-four billion, three hundred thirty-two million, one hundred thirty-five thousand, eight hundred sixty-eight".