5642564656 has 20 divisors (see below), whose sum is σ = 11575555992. Its totient is φ = 2655324416.

The previous prime is 5642564647. The next prime is 5642564657. The reversal of 5642564656 is 6564652465.

It is not an unprimeable number, because it can be changed into a prime (5642564657) 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, 10372090 + ... + 10372633.

Almost surely, 2^5642564656 is an apocalyptic number.

It is an amenable number.

5642564656 is an abundant number, since it is smaller than the sum of its proper divisors (5932991336).

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

5642564656 is a wasteful number, since it uses less digits than its factorization.

5642564656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20744748 (or 20744742 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 49.

The square root of 5642564656 is about 75117.0064366253. The cubic root of 5642564656 is about 1780.2958579045.

The spelling of 5642564656 in words is "five billion, six hundred forty-two million, five hundred sixty-four thousand, six hundred fifty-six".