8657404641 has 12 divisors (see below), whose sum is σ = 12512176768. Its totient is φ = 5768355384.

The previous prime is 8657404607. The next prime is 8657404643. The reversal of 8657404641 is 1464047568.

It is a de Polignac number, because none of the positive numbers 2^k-8657404641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8657404643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253705 + ... + 285798.

Almost surely, 2^8657404641 is an apocalyptic number.

It is an amenable number.

8657404641 is a deficient number, since it is larger than the sum of its proper divisors (3854772127).

8657404641 is a wasteful number, since it uses less digits than its factorization.

8657404641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541292 (or 541289 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 8657404641 is about 93045.1752698656. The cubic root of 8657404641 is about 2053.3480598861.

The spelling of 8657404641 in words is "eight billion, six hundred fifty-seven million, four hundred four thousand, six hundred forty-one".