115865718420 has 96 divisors (see below), whose sum is σ = 337853537280. Its totient is φ = 29636167680.

The previous prime is 115865718403. The next prime is 115865718457. The reversal of 115865718420 is 24817568511.

It is a self number, because there is not a number n which added to its sum of digits gives 115865718420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65455 + ... + 485814.

It is an arithmetic number, because the mean of its divisors is an integer number (3519307680).

Almost surely, 2^115865718420 is an apocalyptic number.

115865718420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115865718420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168926768640).

115865718420 is an abundant number, since it is smaller than the sum of its proper divisors (221987818860).

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

115865718420 is a wasteful number, since it uses less digits than its factorization.

115865718420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551425 (or 551423 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 115865718420 in words is "one hundred fifteen billion, eight hundred sixty-five million, seven hundred eighteen thousand, four hundred twenty".