865699257216 has 32 divisors (see below), whose sum is σ = 2299513653000. Its totient is φ = 288566418944.

The previous prime is 865699257209. The next prime is 865699257217. The reversal of 865699257216 is 612752996568.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865699257217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127212191 + ... + 1127212958.

Almost surely, 2^865699257216 is an apocalyptic number.

It is an amenable number.

865699257216 is an abundant number, since it is smaller than the sum of its proper divisors (1433814395784).

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

865699257216 is a wasteful number, since it uses less digits than its factorization.

865699257216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254425166 (or 2254425154 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 66.

The spelling of 865699257216 in words is "eight hundred sixty-five billion, six hundred ninety-nine million, two hundred fifty-seven thousand, two hundred sixteen".