11449778957 has 2 divisors, whose sum is σ = 11449778958. Its totient is φ = 11449778956.

The previous prime is 11449778929. The next prime is 11449778959. The reversal of 11449778957 is 75987794411.

11449778957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7760552836 + 3689226121 = 88094^2 + 60739^2 .

It is a cyclic number.

It is not a de Polignac number, because 11449778957 - 2⁸ = 11449778701 is a prime.

Together with 11449778959, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11449778957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11449778959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5724889478 + 5724889479.

It is an arithmetic number, because the mean of its divisors is an integer number (5724889479).

Almost surely, 2^11449778957 is an apocalyptic number.

It is an amenable number.

11449778957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11449778957 is an equidigital number, since it uses as much as digits as its factorization.

11449778957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 62.

The spelling of 11449778957 in words is "eleven billion, four hundred forty-nine million, seven hundred seventy-eight thousand, nine hundred fifty-seven".