12722838157 has 4 divisors (see below), whose sum is σ = 12739383580. Its totient is φ = 12706292736.

The previous prime is 12722838133. The next prime is 12722838179. The reversal of 12722838157 is 75183822721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6365805796 + 6357032361 = 79786^2 + 79731^2 .

It is a cyclic number.

It is not a de Polignac number, because 12722838157 - 2¹⁹ = 12722313869 is a prime.

It is a super-2 number, since 2×12722838157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12722838187) by changing a digit.

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, 8271558 + ... + 8273095.

It is an arithmetic number, because the mean of its divisors is an integer number (3184845895).

Almost surely, 2^12722838157 is an apocalyptic number.

It is an amenable number.

12722838157 is a deficient number, since it is larger than the sum of its proper divisors (16545423).

12722838157 is an equidigital number, since it uses as much as digits as its factorization.

12722838157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16545422.

The product of its digits is 376320, while the sum is 46.

The spelling of 12722838157 in words is "twelve billion, seven hundred twenty-two million, eight hundred thirty-eight thousand, one hundred fifty-seven".