115909855920 has 240 divisors, whose sum is σ = 391583648352. Its totient is φ = 30725775360.

The previous prime is 115909855913. The next prime is 115909855931. The reversal of 115909855920 is 29558909511.

115909855920 is a `hidden beast` number, since 11 + 59 + 0 + 9 + 8 + 559 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131267799 + ... + 131268681.

Almost surely, 2^115909855920 is an apocalyptic number.

115909855920 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 115909855920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195791824176).

115909855920 is an abundant number, since it is smaller than the sum of its proper divisors (275673792432).

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

115909855920 is a wasteful number, since it uses less digits than its factorization.

115909855920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 54.

The spelling of 115909855920 in words is "one hundred fifteen billion, nine hundred nine million, eight hundred fifty-five thousand, nine hundred twenty".