865345275678 has 32 divisors (see below), whose sum is σ = 1873186560000. Its totient is φ = 264922089696.

The previous prime is 865345275589. The next prime is 865345275689. The reversal of 865345275678 is 876572543568.

865345275678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×865345275678² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27859278 + ... + 27890321.

It is an arithmetic number, because the mean of its divisors is an integer number (58537080000).

Almost surely, 2^865345275678 is an apocalyptic number.

865345275678 is an abundant number, since it is smaller than the sum of its proper divisors (1007841284322).

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

865345275678 is a wasteful number, since it uses less digits than its factorization.

865345275678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55749816.

The product of its digits is 338688000, while the sum is 66.

The spelling of 865345275678 in words is "eight hundred sixty-five billion, three hundred forty-five million, two hundred seventy-five thousand, six hundred seventy-eight".