865287781941534 has 32 divisors (see below), whose sum is σ = 1978256464316160. Its totient is φ = 247168103069952.

The previous prime is 865287781941511. The next prime is 865287781941553. The reversal of 865287781941534 is 435149187782568.

It is a self number, because there is not a number n which added to its sum of digits gives 865287781941534.

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, 2373877459 + ... + 2374241934.

It is an arithmetic number, because the mean of its divisors is an integer number (61820514509880).

Almost surely, 2^{865287781941534} is an apocalyptic number.

865287781941534 is an abundant number, since it is smaller than the sum of its proper divisors (1112968682374626).

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

865287781941534 is a wasteful number, since it uses less digits than its factorization.

865287781941534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4748123744.

The product of its digits is 3251404800, while the sum is 78.

The spelling of 865287781941534 in words is "eight hundred sixty-five trillion, two hundred eighty-seven billion, seven hundred eighty-one million, nine hundred forty-one thousand, five hundred thirty-four".