12616131449 has 2 divisors, whose sum is σ = 12616131450. Its totient is φ = 12616131448.

The previous prime is 12616131431. The next prime is 12616131469. The reversal of 12616131449 is 94413161621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10372404025 + 2243727424 = 101845^2 + 47368^2 .

It is an emirp because it is prime and its reverse (94413161621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12616131449 - 2³² = 8321164153 is a prime.

It is not a weakly prime, because it can be changed into another prime (12616131469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6308065724 + 6308065725.

It is an arithmetic number, because the mean of its divisors is an integer number (6308065725).

Almost surely, 2^12616131449 is an apocalyptic number.

It is an amenable number.

12616131449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12616131449 is an equidigital number, since it uses as much as digits as its factorization.

12616131449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The spelling of 12616131449 in words is "twelve billion, six hundred sixteen million, one hundred thirty-one thousand, four hundred forty-nine".