11887449847 has 16 divisors (see below), whose sum is σ = 14870562112. Its totient is φ = 9251262720.

The previous prime is 11887449839. The next prime is 11887449853. The reversal of 11887449847 is 74894478811.

11887449847 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 11887449847 - 2³ = 11887449839 is a prime.

It is a super-2 number, since 2×11887449847² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11887443847) 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 15 ways as a sum of consecutive naturals, for example, 1065198 + ... + 1076299.

It is an arithmetic number, because the mean of its divisors is an integer number (929410132).

Almost surely, 2^11887449847 is an apocalyptic number.

11887449847 is a deficient number, since it is larger than the sum of its proper divisors (2983112265).

11887449847 is a wasteful number, since it uses less digits than its factorization.

11887449847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141578.

The product of its digits is 14450688, while the sum is 61.

The spelling of 11887449847 in words is "eleven billion, eight hundred eighty-seven million, four hundred forty-nine thousand, eight hundred forty-seven".