12156789742 has 8 divisors (see below), whose sum is σ = 18278706600. Its totient is φ = 6063887544.

The previous prime is 12156789739. The next prime is 12156789769. The reversal of 12156789742 is 24798765121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12156789742.

It is a congruent number.

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, 7252617 + ... + 7254292.

It is an arithmetic number, because the mean of its divisors is an integer number (2284838325).

Almost surely, 2^12156789742 is an apocalyptic number.

12156789742 is a deficient number, since it is larger than the sum of its proper divisors (6121916858).

12156789742 is a wasteful number, since it uses less digits than its factorization.

12156789742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14507330.

The product of its digits is 1693440, while the sum is 52.

The spelling of 12156789742 in words is "twelve billion, one hundred fifty-six million, seven hundred eighty-nine thousand, seven hundred forty-two".