12155835742 has 8 divisors (see below), whose sum is σ = 18295985736. Its totient is φ = 6057173832.

The previous prime is 12155835719. The next prime is 12155835743. The reversal of 12155835742 is 24753855121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155835743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10371288 + ... + 10372459.

It is an arithmetic number, because the mean of its divisors is an integer number (2286998217).

Almost surely, 2^12155835742 is an apocalyptic number.

12155835742 is a deficient number, since it is larger than the sum of its proper divisors (6140149994).

12155835742 is a wasteful number, since it uses less digits than its factorization.

12155835742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20744042.

The product of its digits is 336000, while the sum is 43.

The spelling of 12155835742 in words is "twelve billion, one hundred fifty-five million, eight hundred thirty-five thousand, seven hundred forty-two".