6865189656 has 72 divisors (see below), whose sum is σ = 18599054940. Its totient is φ = 2110742400.

The previous prime is 6865189627. The next prime is 6865189733. The reversal of 6865189656 is 6569815686.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6865189656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5276206 + ... + 5277506.

Almost surely, 2^6865189656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6865189656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9299527470).

6865189656 is an abundant number, since it is smaller than the sum of its proper divisors (11733865284).

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

6865189656 is a wasteful number, since it uses less digits than its factorization.

6865189656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637 (or 1319 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 60.

The square root of 6865189656 is about 82856.4400393838. The cubic root of 6865189656 is about 1900.5713568842.

The spelling of 6865189656 in words is "six billion, eight hundred sixty-five million, one hundred eighty-nine thousand, six hundred fifty-six".