12516433697 has 2 divisors, whose sum is σ = 12516433698. Its totient is φ = 12516433696.

The previous prime is 12516433691. The next prime is 12516433751. The reversal of 12516433697 is 79633461521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12504606976 + 11826721 = 111824^2 + 3439^2 .

It is an emirp because it is prime and its reverse (79633461521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12516433697 - 2¹⁸ = 12516171553 is a prime.

It is a super-2 number, since 2×12516433697² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12516433691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258216848 + 6258216849.

It is an arithmetic number, because the mean of its divisors is an integer number (6258216849).

Almost surely, 2^12516433697 is an apocalyptic number.

It is an amenable number.

12516433697 is a deficient number, since it is larger than the sum of its proper divisors (1).

12516433697 is an equidigital number, since it uses as much as digits as its factorization.

12516433697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The spelling of 12516433697 in words is "twelve billion, five hundred sixteen million, four hundred thirty-three thousand, six hundred ninety-seven".