11806165990 has 32 divisors (see below), whose sum is σ = 21364884000. Its totient is φ = 4697223168.

The previous prime is 11806165963. The next prime is 11806165991. The reversal of 11806165990 is 9956160811.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11806165990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11806165991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3224781 + ... + 3228439.

It is an arithmetic number, because the mean of its divisors is an integer number (667652625).

Almost surely, 2^11806165990 is an apocalyptic number.

11806165990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11806165990 is a deficient number, since it is larger than the sum of its proper divisors (9558718010).

11806165990 is a wasteful number, since it uses less digits than its factorization.

11806165990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5304.

The product of its (nonzero) digits is 116640, while the sum is 46.

The spelling of 11806165990 in words is "eleven billion, eight hundred six million, one hundred sixty-five thousand, nine hundred ninety".