12631742722 has 4 divisors (see below), whose sum is σ = 18947614086. Its totient is φ = 6315871360.

The previous prime is 12631742719. The next prime is 12631742723. The reversal of 12631742722 is 22724713621.

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

It can be written as a sum of positive squares in only one way, i.e., 8406872721 + 4224870001 = 91689^2 + 64999^2 .

It is not an unprimeable number, because it can be changed into a prime (12631742723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3157935679 + ... + 3157935682.

Almost surely, 2^12631742722 is an apocalyptic number.

12631742722 is a deficient number, since it is larger than the sum of its proper divisors (6315871364).

12631742722 is an equidigital number, since it uses as much as digits as its factorization.

12631742722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6315871363.

The product of its digits is 56448, while the sum is 37.

The spelling of 12631742722 in words is "twelve billion, six hundred thirty-one million, seven hundred forty-two thousand, seven hundred twenty-two".