12115660240 has 40 divisors (see below), whose sum is σ = 28176544800. Its totient is φ = 4844950656.

The previous prime is 12115660237. The next prime is 12115660243. The reversal of 12115660240 is 4206651121.

It is an interprime number because it is at equal distance from previous prime (12115660237) and next prime (12115660243).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×12115660240² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12115660199 and 12115660208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12115660243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309447 + ... + 346393.

It is an arithmetic number, because the mean of its divisors is an integer number (704413620).

Almost surely, 2^12115660240 is an apocalyptic number.

12115660240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12115660240 is an abundant number, since it is smaller than the sum of its proper divisors (16060884560).

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

12115660240 is a wasteful number, since it uses less digits than its factorization.

12115660240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41059 (or 41053 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 12115660240 in words is "twelve billion, one hundred fifteen million, six hundred sixty thousand, two hundred forty".