12720422169 has 160 divisors (see below), whose sum is σ = 24354570240. Its totient is φ = 6436195200.

The previous prime is 12720422161. The next prime is 12720422177. The reversal of 12720422169 is 96122402721.

12720422169 is a `hidden beast` number, since 1 + 2 + 72 + 0 + 422 + 169 = 666.

It is an interprime number because it is at equal distance from previous prime (12720422161) and next prime (12720422177).

It is not a de Polignac number, because 12720422169 - 2³ = 12720422161 is a prime.

It is a super-2 number, since 2×12720422169² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12720422161) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 40901524 + ... + 40901834.

It is an arithmetic number, because the mean of its divisors is an integer number (152216064).

Almost surely, 2^12720422169 is an apocalyptic number.

It is an amenable number.

12720422169 is a deficient number, since it is larger than the sum of its proper divisors (11634148071).

12720422169 is a wasteful number, since it uses less digits than its factorization.

12720422169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 12720422169 in words is "twelve billion, seven hundred twenty million, four hundred twenty-two thousand, one hundred sixty-nine".