865789868736 has 168 divisors, whose sum is σ = 2829732744384. Its totient is φ = 250726440960.

The previous prime is 865789868731. The next prime is 865789868737. The reversal of 865789868736 is 637868987568.

865789868736 is a `hidden beast` number, since 8 + 6 + 578 + 9 + 8 + 6 + 8 + 7 + 36 = 666.

It is a super-2 number, since 2×865789868736² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (865789868731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3273400 + ... + 3527991.

It is an arithmetic number, because the mean of its divisors is an integer number (16843647288).

Almost surely, 2^865789868736 is an apocalyptic number.

It is an amenable number.

865789868736 is an abundant number, since it is smaller than the sum of its proper divisors (1963942875648).

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

865789868736 is a wasteful number, since it uses less digits than its factorization.

865789868736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6801439 (or 6801426 counting only the distinct ones).

The product of its digits is 5852528640, while the sum is 81.

The spelling of 865789868736 in words is "eight hundred sixty-five billion, seven hundred eighty-nine million, eight hundred sixty-eight thousand, seven hundred thirty-six".