115818697728 has 132 divisors (see below), whose sum is σ = 337673578528. Its totient is φ = 38231101440.

The previous prime is 115818697681. The next prime is 115818697747. The reversal of 115818697728 is 827796818511.

It is a super-4 number, since 4×115818697728⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 888243 + ... + 1010253.

Almost surely, 2^115818697728 is an apocalyptic number.

115818697728 is a gapful number since it is divisible by the number (18) 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 115818697728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168836789264).

115818697728 is an abundant number, since it is smaller than the sum of its proper divisors (221854880800).

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

115818697728 is a wasteful number, since it uses less digits than its factorization.

115818697728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122140 (or 122119 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 63.

The spelling of 115818697728 in words is "one hundred fifteen billion, eight hundred eighteen million, six hundred ninety-seven thousand, seven hundred twenty-eight".