115540404240 has 160 divisors (see below), whose sum is σ = 369345860352. Its totient is φ = 29859840000.

The previous prime is 115540404223. The next prime is 115540404241. The reversal of 115540404240 is 42404045511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 115540404198 and 115540404207.

It is not an unprimeable number, because it can be changed into a prime (115540404241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1446960 + ... + 1524720.

Almost surely, 2^115540404240 is an apocalyptic number.

115540404240 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 115540404240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184672930176).

115540404240 is an abundant number, since it is smaller than the sum of its proper divisors (253805456112).

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

115540404240 is a wasteful number, since it uses less digits than its factorization.

115540404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77969 (or 77963 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 115540404240 its reverse (42404045511), we get a palindrome (157944449751).

The spelling of 115540404240 in words is "one hundred fifteen billion, five hundred forty million, four hundred four thousand, two hundred forty".