865221912032 has 24 divisors (see below), whose sum is σ = 1703613107952. Its totient is φ = 432558265600.

The previous prime is 865221912017. The next prime is 865221912077. The reversal of 865221912032 is 230219122568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1379069 + ... + 1905852.

It is an arithmetic number, because the mean of its divisors is an integer number (70983879498).

Almost surely, 2^865221912032 is an apocalyptic number.

It is an amenable number.

865221912032 is a deficient number, since it is larger than the sum of its proper divisors (838391195920).

865221912032 is a wasteful number, since it uses less digits than its factorization.

865221912032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293162 (or 3293154 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 865221912032 in words is "eight hundred sixty-five billion, two hundred twenty-one million, nine hundred twelve thousand, thirty-two".