12401981156 has 12 divisors (see below), whose sum is σ = 22647096192. Its totient is φ = 5931382248.

The previous prime is 12401981149. The next prime is 12401981203. The reversal of 12401981156 is 65118910421.

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 3 ways as a sum of consecutive naturals, for example, 67401980 + ... + 67402163.

It is an arithmetic number, because the mean of its divisors is an integer number (1887258016).

Almost surely, 2^12401981156 is an apocalyptic number.

It is an amenable number.

12401981156 is a deficient number, since it is larger than the sum of its proper divisors (10245115036).

12401981156 is a wasteful number, since it uses less digits than its factorization.

12401981156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134804170 (or 134804168 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 38.

The spelling of 12401981156 in words is "twelve billion, four hundred one million, nine hundred eighty-one thousand, one hundred fifty-six".