115240115440 has 80 divisors (see below), whose sum is σ = 284163455232. Its totient is φ = 43312730112.

The previous prime is 115240115411. The next prime is 115240115461. The reversal of 115240115440 is 44511042511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 115240115399 and 115240115408.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 755722 + ... + 895318.

Almost surely, 2^115240115440 is an apocalyptic number.

115240115440 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 115240115440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142081727616).

115240115440 is an abundant number, since it is smaller than the sum of its proper divisors (168923339792).

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

115240115440 is a wasteful number, since it uses less digits than its factorization.

115240115440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140234 (or 140228 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 115240115440 its reverse (44511042511), we get a palindrome (159751157951).

The spelling of 115240115440 in words is "one hundred fifteen billion, two hundred forty million, one hundred fifteen thousand, four hundred forty".