8645773872 has 80 divisors (see below), whose sum is σ = 22528915200. Its totient is φ = 2856973056.

The previous prime is 8645773841. The next prime is 8645773879. The reversal of 8645773872 is 2783775468.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8645773879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5313123 + ... + 5314749.

It is an arithmetic number, because the mean of its divisors is an integer number (281611440).

Almost surely, 2^8645773872 is an apocalyptic number.

It is an amenable number.

8645773872 is an abundant number, since it is smaller than the sum of its proper divisors (13883141328).

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

8645773872 is a wasteful number, since it uses less digits than its factorization.

8645773872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530 (or 2524 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 57.

The square root of 8645773872 is about 92982.6536080790. The cubic root of 8645773872 is about 2052.4281259996.

The spelling of 8645773872 in words is "eight billion, six hundred forty-five million, seven hundred seventy-three thousand, eight hundred seventy-two".