115611115520 has 112 divisors (see below), whose sum is σ = 289515133440. Its totient is φ = 44233457664.

The previous prime is 115611115489. The next prime is 115611115537. The reversal of 115611115520 is 25511116511.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880721 + ... + 1003439.

Almost surely, 2^115611115520 is an apocalyptic number.

115611115520 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 115611115520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144757566720).

115611115520 is an abundant number, since it is smaller than the sum of its proper divisors (173904017920).

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

115611115520 is an equidigital number, since it uses as much as digits as its factorization.

115611115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122773 (or 122749 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 29.

Subtracting from 115611115520 its reverse (25511116511), we obtain a palindrome (90099999009).

The spelling of 115611115520 in words is "one hundred fifteen billion, six hundred eleven million, one hundred fifteen thousand, five hundred twenty".