12169405518579 has 6 divisors (see below), whose sum is σ = 17578030193516. Its totient is φ = 8112937012380.

The previous prime is 12169405518559. The next prime is 12169405518661. The reversal of 12169405518579 is 97581550496121.

It is a happy number.

12169405518579 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 9 + 4 + 0 + 5 + 51 + 8 + 579 = 666.

It is not a de Polignac number, because 12169405518579 - 2⁷ = 12169405518451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12169405518559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 676078084357 + ... + 676078084374.

Almost surely, 2^{12169405518579} is an apocalyptic number.

12169405518579 is a deficient number, since it is larger than the sum of its proper divisors (5408624674937).

12169405518579 is a wasteful number, since it uses less digits than its factorization.

12169405518579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352156168737 (or 1352156168734 counting only the distinct ones).

The product of its (nonzero) digits is 27216000, while the sum is 63.

The spelling of 12169405518579 in words is "twelve trillion, one hundred sixty-nine billion, four hundred five million, five hundred eighteen thousand, five hundred seventy-nine".