64071132768 has 36 divisors (see below), whose sum is σ = 182202284628. Its totient is φ = 21357044160.

The previous prime is 64071132757. The next prime is 64071132773. The reversal of 64071132768 is 86723117046.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×64071132768² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111234318 + ... + 111234893.

It is an arithmetic number, because the mean of its divisors is an integer number (5061174573).

Almost surely, 2^64071132768 is an apocalyptic number.

It is an amenable number.

64071132768 is an abundant number, since it is smaller than the sum of its proper divisors (118131151860).

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

64071132768 is a wasteful number, since it uses less digits than its factorization.

64071132768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222469227 (or 222469216 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 64071132768 in words is "sixty-four billion, seventy-one million, one hundred thirty-two thousand, seven hundred sixty-eight".