865873788312 has 64 divisors (see below), whose sum is σ = 2453893344000. Its totient is φ = 252400454784.

The previous prime is 865873788257. The next prime is 865873788313. The reversal of 865873788312 is 213887378568.

865873788312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865873788313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73026612 + ... + 73038467.

It is an arithmetic number, because the mean of its divisors is an integer number (38342083500).

Almost surely, 2^865873788312 is an apocalyptic number.

It is an amenable number.

865873788312 is an abundant number, since it is smaller than the sum of its proper divisors (1588019555688).

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

865873788312 is a wasteful number, since it uses less digits than its factorization.

865873788312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146065120 (or 146065116 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 66.

The spelling of 865873788312 in words is "eight hundred sixty-five billion, eight hundred seventy-three million, seven hundred eighty-eight thousand, three hundred twelve".