11047717661 has 4 divisors (see below), whose sum is σ = 11071374912. Its totient is φ = 11024060412.

The previous prime is 11047717559. The next prime is 11047717663. The reversal of 11047717661 is 16671774011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11047717661 - 2¹⁰ = 11047716637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11047717663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11827925 + ... + 11828858.

It is an arithmetic number, because the mean of its divisors is an integer number (2767843728).

Almost surely, 2^11047717661 is an apocalyptic number.

It is an amenable number.

11047717661 is a deficient number, since it is larger than the sum of its proper divisors (23657251).

11047717661 is an equidigital number, since it uses as much as digits as its factorization.

11047717661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23657250.

The product of its (nonzero) digits is 49392, while the sum is 41.

The spelling of 11047717661 in words is "eleven billion, forty-seven million, seven hundred seventeen thousand, six hundred sixty-one".