115709915880 has 640 divisors, whose sum is σ = 451982916000. Its totient is φ = 26292584448.

The previous prime is 115709915879. The next prime is 115709915903. The reversal of 115709915880 is 88519907511.

It is a happy number.

115709915880 is a `hidden beast` number, since 1 + 1 + 57 + 0 + 9 + 9 + 1 + 588 + 0 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 3051678564 + 112658237316 = 55242^2 + 335646^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 37948596 + ... + 37951644.

Almost surely, 2^115709915880 is an apocalyptic number.

115709915880 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 115709915880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225991458000).

115709915880 is an abundant number, since it is smaller than the sum of its proper divisors (336273000120).

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

115709915880 is a wasteful number, since it uses less digits than its factorization.

115709915880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155 (or 3142 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 54.

The spelling of 115709915880 in words is "one hundred fifteen billion, seven hundred nine million, nine hundred fifteen thousand, eight hundred eighty".