64576222172 has 48 divisors (see below), whose sum is σ = 140925120000. Its totient is φ = 25153934400.

The previous prime is 64576222103. The next prime is 64576222177. The reversal of 64576222172 is 27122267546.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64576222177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1518722 + ... + 1560662.

It is an arithmetic number, because the mean of its divisors is an integer number (2935940000).

Almost surely, 2^64576222172 is an apocalyptic number.

It is an amenable number.

64576222172 is an abundant number, since it is smaller than the sum of its proper divisors (76348897828).

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

64576222172 is a wasteful number, since it uses less digits than its factorization.

64576222172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46962 (or 46960 counting only the distinct ones).

The product of its digits is 564480, while the sum is 44.

The spelling of 64576222172 in words is "sixty-four billion, five hundred seventy-six million, two hundred twenty-two thousand, one hundred seventy-two".