115811540424 has 80 divisors (see below), whose sum is σ = 326369902320. Its totient is φ = 38366978400.

The previous prime is 115811540419. The next prime is 115811540431. The reversal of 115811540424 is 424045118511.

115811540424 is a `hidden beast` number, since 1 + 1 + 5 + 81 + 154 + 0 + 424 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 442602 + ... + 653849.

It is an arithmetic number, because the mean of its divisors is an integer number (4079623779).

Almost surely, 2^115811540424 is an apocalyptic number.

It is an amenable number.

115811540424 is an abundant number, since it is smaller than the sum of its proper divisors (210558361896).

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

115811540424 is a wasteful number, since it uses less digits than its factorization.

115811540424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096632 (or 1096619 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

Adding to 115811540424 its reverse (424045118511), we get a palindrome (539856658935).

The spelling of 115811540424 in words is "one hundred fifteen billion, eight hundred eleven million, five hundred forty thousand, four hundred twenty-four".