11810991047 has 8 divisors (see below), whose sum is σ = 11904097392. Its totient is φ = 11717929600.

The previous prime is 11810991013. The next prime is 11810991053. The reversal of 11810991047 is 74019901811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11810991047 - 2¹² = 11810986951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11810990995 and 11810991013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11810991067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685397 + ... + 702417.

It is an arithmetic number, because the mean of its divisors is an integer number (1488012174).

Almost surely, 2^11810991047 is an apocalyptic number.

11810991047 is a deficient number, since it is larger than the sum of its proper divisors (93106345).

11810991047 is a wasteful number, since it uses less digits than its factorization.

11810991047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22449.

The product of its (nonzero) digits is 18144, while the sum is 41.

The spelling of 11810991047 in words is "eleven billion, eight hundred ten million, nine hundred ninety-one thousand, forty-seven".