115831379520 has 336 divisors, whose sum is σ = 428156022528. Its totient is φ = 28636692480.

The previous prime is 115831379519. The next prime is 115831379533. The reversal of 115831379520 is 25973138511.

115831379520 is a `hidden beast` number, since 1 + 1 + 58 + 3 + 1 + 3 + 79 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3262665 + ... + 3297975.

Almost surely, 2^115831379520 is an apocalyptic number.

115831379520 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 115831379520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214078011264).

115831379520 is an abundant number, since it is smaller than the sum of its proper divisors (312324643008).

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

115831379520 is a wasteful number, since it uses less digits than its factorization.

115831379520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35418 (or 35405 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 115831379520 in words is "one hundred fifteen billion, eight hundred thirty-one million, three hundred seventy-nine thousand, five hundred twenty".