11981828806 has 4 divisors (see below), whose sum is σ = 17972743212. Its totient is φ = 5990914402.

The previous prime is 11981828797. The next prime is 11981828827. The reversal of 11981828806 is 60882818911.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2995457200 + ... + 2995457203.

It is an arithmetic number, because the mean of its divisors is an integer number (4493185803).

Almost surely, 2^11981828806 is an apocalyptic number.

11981828806 is a deficient number, since it is larger than the sum of its proper divisors (5990914406).

11981828806 is an equidigital number, since it uses as much as digits as its factorization.

11981828806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5990914405.

The product of its (nonzero) digits is 442368, while the sum is 52.

The spelling of 11981828806 in words is "eleven billion, nine hundred eighty-one million, eight hundred twenty-eight thousand, eight hundred six".