8657542643 has 8 divisors (see below), whose sum is σ = 9098311728. Its totient is φ = 8227656864.

The previous prime is 8657542601. The next prime is 8657542651. The reversal of 8657542643 is 3462457568.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8657542643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8657542591 and 8657542600.

It is not an unprimeable number, because it can be changed into a prime (8657541643) 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, 2719196 + ... + 2722377.

It is an arithmetic number, because the mean of its divisors is an integer number (1137288966).

Almost surely, 2^8657542643 is an apocalyptic number.

8657542643 is a deficient number, since it is larger than the sum of its proper divisors (440769085).

8657542643 is a wasteful number, since it uses less digits than its factorization.

8657542643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441653.

The product of its digits is 4838400, while the sum is 50.

The square root of 8657542643 is about 93045.9168529173. The cubic root of 8657542643 is about 2053.3589701856.

The spelling of 8657542643 in words is "eight billion, six hundred fifty-seven million, five hundred forty-two thousand, six hundred forty-three".