115015121440 has 24 divisors (see below), whose sum is σ = 271723224780. Its totient is φ = 46006048512.

The previous prime is 115015121437. The next prime is 115015121467. The reversal of 115015121440 is 44121510511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 110146989456 + 4868131984 = 331884^2 + 69772^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359422095 + ... + 359422414.

Almost surely, 2^115015121440 is an apocalyptic number.

115015121440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115015121440 is an abundant number, since it is smaller than the sum of its proper divisors (156708103340).

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

115015121440 is an equidigital number, since it uses as much as digits as its factorization.

115015121440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718844524 (or 718844516 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 115015121440 its reverse (44121510511), we get a palindrome (159136631951).

The spelling of 115015121440 in words is "one hundred fifteen billion, fifteen million, one hundred twenty-one thousand, four hundred forty".