8521444872 has 48 divisors (see below), whose sum is σ = 23217143040. Its totient is φ = 2823468768.

The previous prime is 8521444849. The next prime is 8521444937. The reversal of 8521444872 is 2784441258.

8521444872 is a `hidden beast` number, since 8 + 521 + 4 + 44 + 87 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342328 + ... + 366375.

It is an arithmetic number, because the mean of its divisors is an integer number (483690480).

Almost surely, 2^8521444872 is an apocalyptic number.

It is an amenable number.

8521444872 is an abundant number, since it is smaller than the sum of its proper divisors (14695698168).

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

8521444872 is a wasteful number, since it uses less digits than its factorization.

8521444872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708882 (or 708875 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The square root of 8521444872 is about 92311.6724580375. The cubic root of 8521444872 is about 2042.5423953343.

The spelling of 8521444872 in words is "eight billion, five hundred twenty-one million, four hundred forty-four thousand, eight hundred seventy-two".