111512646449 has 2 divisors, whose sum is σ = 111512646450. Its totient is φ = 111512646448.

The previous prime is 111512646391. The next prime is 111512646457. The reversal of 111512646449 is 944646215111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77938680625 + 33573965824 = 279175^2 + 183232^2 .

It is an emirp because it is prime and its reverse (944646215111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111512646449 - 2²⁸ = 111244210993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111512646149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55756323224 + 55756323225.

It is an arithmetic number, because the mean of its divisors is an integer number (55756323225).

Almost surely, 2^111512646449 is an apocalyptic number.

It is an amenable number.

111512646449 is a deficient number, since it is larger than the sum of its proper divisors (1).

111512646449 is an equidigital number, since it uses as much as digits as its factorization.

111512646449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The spelling of 111512646449 in words is "one hundred eleven billion, five hundred twelve million, six hundred forty-six thousand, four hundred forty-nine".