12169356691 has 2 divisors, whose sum is σ = 12169356692. Its totient is φ = 12169356690.

The previous prime is 12169356679. The next prime is 12169356709. The reversal of 12169356691 is 19665396121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12169356691 is a prime.

It is not a weakly prime, because it can be changed into another prime (12169356601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6084678345 + 6084678346.

It is an arithmetic number, because the mean of its divisors is an integer number (6084678346).

Almost surely, 2^12169356691 is an apocalyptic number.

12169356691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12169356691 is an equidigital number, since it uses as much as digits as its factorization.

12169356691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 49.

The spelling of 12169356691 in words is "twelve billion, one hundred sixty-nine million, three hundred fifty-six thousand, six hundred ninety-one".