11811747047 has 8 divisors (see below), whose sum is σ = 11857438992. Its totient is φ = 11766081600.

The previous prime is 11811747041. The next prime is 11811747097. The reversal of 11811747047 is 74074711811.

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 11811747047 - 2¹⁸ = 11811484903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11811746995 and 11811747013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811747041) 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, 1794272 + ... + 1800842.

It is an arithmetic number, because the mean of its divisors is an integer number (1482179874).

Almost surely, 2^11811747047 is an apocalyptic number.

11811747047 is a deficient number, since it is larger than the sum of its proper divisors (45691945).

11811747047 is an equidigital number, since it uses as much as digits as its factorization.

11811747047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13249.

The product of its (nonzero) digits is 43904, while the sum is 41.

The spelling of 11811747047 in words is "eleven billion, eight hundred eleven million, seven hundred forty-seven thousand, forty-seven".