13164565991 has 2 divisors, whose sum is σ = 13164565992. Its totient is φ = 13164565990.

The previous prime is 13164565987. The next prime is 13164566011. The reversal of 13164565991 is 19956546131.

It is a weak prime.

It is an emirp because it is prime and its reverse (19956546131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13164565991 - 2² = 13164565987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13164565091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6582282995 + 6582282996.

It is an arithmetic number, because the mean of its divisors is an integer number (6582282996).

Almost surely, 2^13164565991 is an apocalyptic number.

13164565991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13164565991 is an equidigital number, since it uses as much as digits as its factorization.

13164565991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 50.

The spelling of 13164565991 in words is "thirteen billion, one hundred sixty-four million, five hundred sixty-five thousand, nine hundred ninety-one".