11405549986 has 16 divisors (see below), whose sum is σ = 17572633848. Its totient is φ = 5548752000.

The previous prime is 11405549927. The next prime is 11405549989. The reversal of 11405549986 is 68994550411.

11405549986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3941453961 + 7464096025 = 62781^2 + 86395^2 .

It is not an unprimeable number, because it can be changed into a prime (11405549989) 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 7 ways as a sum of consecutive naturals, for example, 155865 + ... + 217036.

Almost surely, 2^11405549986 is an apocalyptic number.

11405549986 is a deficient number, since it is larger than the sum of its proper divisors (6167083862).

11405549986 is a wasteful number, since it uses less digits than its factorization.

11405549986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373317.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 11405549986 in words is "eleven billion, four hundred five million, five hundred forty-nine thousand, nine hundred eighty-six".