12661732319 has 2 divisors, whose sum is σ = 12661732320. Its totient is φ = 12661732318.

The previous prime is 12661732301. The next prime is 12661732327. The reversal of 12661732319 is 91323716621.

It is a strong prime.

It is an emirp because it is prime and its reverse (91323716621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12661732319 - 2¹² = 12661728223 is a prime.

It is a super-2 number, since 2×12661732319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12661731319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330866159 + 6330866160.

It is an arithmetic number, because the mean of its divisors is an integer number (6330866160).

Almost surely, 2^12661732319 is an apocalyptic number.

12661732319 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661732319 is an equidigital number, since it uses as much as digits as its factorization.

12661732319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The spelling of 12661732319 in words is "twelve billion, six hundred sixty-one million, seven hundred thirty-two thousand, three hundred nineteen".