865781141980 has 12 divisors (see below), whose sum is σ = 1818140398200. Its totient is φ = 346312456784.

The previous prime is 865781141977. The next prime is 865781141983. The reversal of 865781141980 is 89141187568.

865781141980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (865781141977) and next prime (865781141983).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865781141983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21644528530 + ... + 21644528569.

It is an arithmetic number, because the mean of its divisors is an integer number (151511699850).

Almost surely, 2^865781141980 is an apocalyptic number.

It is an amenable number.

865781141980 is an abundant number, since it is smaller than the sum of its proper divisors (952359256220).

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

865781141980 is a wasteful number, since it uses less digits than its factorization.

865781141980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43289057108 (or 43289057106 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 58.

The spelling of 865781141980 in words is "eight hundred sixty-five billion, seven hundred eighty-one million, one hundred forty-one thousand, nine hundred eighty".