12156789740 has 24 divisors (see below), whose sum is σ = 25550048832. Its totient is φ = 4858755840.

The previous prime is 12156789739. The next prime is 12156789769. The reversal of 12156789740 is 4798765121.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 222269 + ... + 271508.

It is an arithmetic number, because the mean of its divisors is an integer number (1064585368).

Almost surely, 2^12156789740 is an apocalyptic number.

12156789740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12156789740 is an abundant number, since it is smaller than the sum of its proper divisors (13393259092).

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

12156789740 is a wasteful number, since it uses less digits than its factorization.

12156789740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495017 (or 495015 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 12156789740 in words is "twelve billion, one hundred fifty-six million, seven hundred eighty-nine thousand, seven hundred forty".