64221308872 has 32 divisors (see below), whose sum is σ = 144860097600. Its totient is φ = 26074816704.

The previous prime is 64221308863. The next prime is 64221308927. The reversal of 64221308872 is 27880312246.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30178123 + ... + 30180250.

It is an arithmetic number, because the mean of its divisors is an integer number (4526878050).

Almost surely, 2^64221308872 is an apocalyptic number.

It is an amenable number.

64221308872 is an abundant number, since it is smaller than the sum of its proper divisors (80638788728).

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

64221308872 is a wasteful number, since it uses less digits than its factorization.

64221308872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60358405 (or 60358401 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 64221308872 in words is "sixty-four billion, two hundred twenty-one million, three hundred eight thousand, eight hundred seventy-two".