11997456849 has 24 divisors (see below), whose sum is σ = 19845713472. Its totient is φ = 6841709280.

The previous prime is 11997456841. The next prime is 11997456871. The reversal of 11997456849 is 94865479911.

11997456849 is a `hidden beast` number, since 1 + 19 + 97 + 456 + 84 + 9 = 666.

11997456849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11997456849 - 2³ = 11997456841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (11997456841) 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 in 23 ways as a sum of consecutive naturals, for example, 162994 + ... + 224859.

It is an arithmetic number, because the mean of its divisors is an integer number (826904728).

Almost surely, 2^11997456849 is an apocalyptic number.

It is an amenable number.

11997456849 is a deficient number, since it is larger than the sum of its proper divisors (7848256623).

11997456849 is a wasteful number, since it uses less digits than its factorization.

11997456849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388357 (or 388354 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The spelling of 11997456849 in words is "eleven billion, nine hundred ninety-seven million, four hundred fifty-six thousand, eight hundred forty-nine".