656442163 has 4 divisors (see below), whose sum is σ = 706937728. Its totient is φ = 605946600.

The previous prime is 656442109. The next prime is 656442203. The reversal of 656442163 is 361244656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656442163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656442263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25247763 + ... + 25247788.

It is an arithmetic number, because the mean of its divisors is an integer number (176734432).

Almost surely, 2^656442163 is an apocalyptic number.

656442163 is a deficient number, since it is larger than the sum of its proper divisors (50495565).

656442163 is a wasteful number, since it uses less digits than its factorization.

656442163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50495564.

The product of its digits is 103680, while the sum is 37.

The square root of 656442163 is about 25621.1272780883. The cubic root of 656442163 is about 869.0914737322.

The spelling of 656442163 in words is "six hundred fifty-six million, four hundred forty-two thousand, one hundred sixty-three".