11183381661 has 16 divisors (see below), whose sum is σ = 14982129920. Its totient is φ = 7420170240.

The previous prime is 11183381641. The next prime is 11183381707. The reversal of 11183381661 is 16618338111.

It is a de Polignac number, because none of the positive numbers 2^k-11183381661 is a prime.

It is a super-2 number, since 2×11183381661² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11183381641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813501 + ... + 827133.

It is an arithmetic number, because the mean of its divisors is an integer number (936383120).

Almost surely, 2^11183381661 is an apocalyptic number.

It is an amenable number.

11183381661 is a deficient number, since it is larger than the sum of its proper divisors (3798748259).

11183381661 is a wasteful number, since it uses less digits than its factorization.

11183381661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14916.

The product of its digits is 20736, while the sum is 39.

The spelling of 11183381661 in words is "eleven billion, one hundred eighty-three million, three hundred eighty-one thousand, six hundred sixty-one".