8636872640 has 56 divisors (see below), whose sum is σ = 22436248752. Its totient is φ = 3140679680.

The previous prime is 8636872639. The next prime is 8636872679. The reversal of 8636872640 is 462786368.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223309 + ... + 1230348.

Almost surely, 2^8636872640 is an apocalyptic number.

8636872640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8636872640 is an abundant number, since it is smaller than the sum of its proper divisors (13799376112).

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

8636872640 is a wasteful number, since it uses less digits than its factorization.

8636872640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453685 (or 2453675 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 50.

The square root of 8636872640 is about 92934.7762680903. The cubic root of 8636872640 is about 2051.7235269504.

The spelling of 8636872640 in words is "eight billion, six hundred thirty-six million, eight hundred seventy-two thousand, six hundred forty".