8557188872 has 16 divisors (see below), whose sum is σ = 16069309740. Its totient is φ = 4272039616.

The previous prime is 8557188869. The next prime is 8557188907. The reversal of 8557188872 is 2788817558.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8005596676 + 551592196 = 89474^2 + 23486^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813803 + ... + 824250.

Almost surely, 2^8557188872 is an apocalyptic number.

It is an amenable number.

8557188872 is a deficient number, since it is larger than the sum of its proper divisors (7512120868).

8557188872 is a wasteful number, since it uses less digits than its factorization.

8557188872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638712 (or 1638708 counting only the distinct ones).

The product of its digits is 10035200, while the sum is 59.

The square root of 8557188872 is about 92505.0748445727. The cubic root of 8557188872 is about 2045.3942900997.

The spelling of 8557188872 in words is "eight billion, five hundred fifty-seven million, one hundred eighty-eight thousand, eight hundred seventy-two".