64880533664 has 24 divisors (see below), whose sum is σ = 133287184800. Its totient is φ = 31029820096.

The previous prime is 64880533661. The next prime is 64880533673. The reversal of 64880533664 is 46633508846.

It is not an unprimeable number, because it can be changed into a prime (64880533661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44075714 + ... + 44077185.

It is an arithmetic number, because the mean of its divisors is an integer number (5553632700).

Almost surely, 2^64880533664 is an apocalyptic number.

It is an amenable number.

64880533664 is an abundant number, since it is smaller than the sum of its proper divisors (68406651136).

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

64880533664 is a wasteful number, since it uses less digits than its factorization.

64880533664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88152932 (or 88152924 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 53.

The spelling of 64880533664 in words is "sixty-four billion, eight hundred eighty million, five hundred thirty-three thousand, six hundred sixty-four".