12642771142 has 4 divisors (see below), whose sum is σ = 18964156716. Its totient is φ = 6321385570.

The previous prime is 12642771131. The next prime is 12642771151. The reversal of 12642771142 is 24117724621.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3160692784 + ... + 3160692787.

It is an arithmetic number, because the mean of its divisors is an integer number (4741039179).

Almost surely, 2^12642771142 is an apocalyptic number.

12642771142 is a deficient number, since it is larger than the sum of its proper divisors (6321385574).

12642771142 is an equidigital number, since it uses as much as digits as its factorization.

12642771142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6321385573.

The product of its digits is 37632, while the sum is 37.

The spelling of 12642771142 in words is "twelve billion, six hundred forty-two million, seven hundred seventy-one thousand, one hundred forty-two".