12112765440 has 80 divisors (see below), whose sum is σ = 38723021568. Its totient is φ = 3230068736.

The previous prime is 12112765433. The next prime is 12112765447. The reversal of 12112765440 is 4456721121.

It is an interprime number because it is at equal distance from previous prime (12112765433) and next prime (12112765447).

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

It is not an unprimeable number, because it can be changed into a prime (12112765447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780912 + ... + 796271.

Almost surely, 2^12112765440 is an apocalyptic number.

12112765440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112765440 is an abundant number, since it is smaller than the sum of its proper divisors (26610256128).

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

12112765440 is an equidigital number, since it uses as much as digits as its factorization.

12112765440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577209 (or 1577193 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 12112765440 in words is "twelve billion, one hundred twelve million, seven hundred sixty-five thousand, four hundred forty".