8656389564 has 24 divisors (see below), whose sum is σ = 20214873168. Its totient is φ = 2883087360.

The previous prime is 8656389557. The next prime is 8656389583. The reversal of 8656389564 is 4659836568.

It is a happy number.

It is a super-2 number, since 2×8656389564² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8656389498 and 8656389507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281767 + ... + 310974.

It is an arithmetic number, because the mean of its divisors is an integer number (842286382).

Almost surely, 2^8656389564 is an apocalyptic number.

It is an amenable number.

8656389564 is an abundant number, since it is smaller than the sum of its proper divisors (11558483604).

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

8656389564 is a wasteful number, since it uses less digits than its factorization.

8656389564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593965 (or 593963 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 60.

The square root of 8656389564 is about 93039.7203564155. The cubic root of 8656389564 is about 2053.2678053548.

The spelling of 8656389564 in words is "eight billion, six hundred fifty-six million, three hundred eighty-nine thousand, five hundred sixty-four".