11447883891 has 24 divisors (see below), whose sum is σ = 16707605616. Its totient is φ = 7552849920.

The previous prime is 11447883869. The next prime is 11447883899. The reversal of 11447883891 is 19838874411.

11447883891 is a `hidden beast` number, since 1 + 1 + 4 + 478 + 83 + 8 + 91 = 666.

11447883891 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 11447883891 - 2¹⁹ = 11447359603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11447883899) 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, 686371 + ... + 702851.

It is an arithmetic number, because the mean of its divisors is an integer number (696150234).

Almost surely, 2^11447883891 is an apocalyptic number.

11447883891 is a deficient number, since it is larger than the sum of its proper divisors (5259721725).

11447883891 is a wasteful number, since it uses less digits than its factorization.

11447883891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17283 (or 17280 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 11447883891 in words is "eleven billion, four hundred forty-seven million, eight hundred eighty-three thousand, eight hundred ninety-one".