8636872641 has 8 divisors (see below), whose sum is σ = 11516615040. Its totient is φ = 5757522672.

The previous prime is 8636872639. The next prime is 8636872679. The reversal of 8636872641 is 1462786368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8636872641 - 2¹ = 8636872639 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8636872441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42201 + ... + 138038.

It is an arithmetic number, because the mean of its divisors is an integer number (1439576880).

Almost surely, 2^8636872641 is an apocalyptic number.

It is an amenable number.

8636872641 is a deficient number, since it is larger than the sum of its proper divisors (2879742399).

8636872641 is a wasteful number, since it uses less digits than its factorization.

8636872641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196215.

The product of its digits is 2322432, while the sum is 51.

The square root of 8636872641 is about 92934.7762734704. The cubic root of 8636872641 is about 2051.7235270296.

The spelling of 8636872641 in words is "eight billion, six hundred thirty-six million, eight hundred seventy-two thousand, six hundred forty-one".