11806681069 has 4 divisors (see below), whose sum is σ = 11839569120. Its totient is φ = 11773793020.

The previous prime is 11806680971. The next prime is 11806681079. The reversal of 11806681069 is 96018660811.

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 11806681069 - 2²³ = 11798292461 is a prime.

It is a super-2 number, since 2×11806681069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11806681079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16443487 + ... + 16444204.

It is an arithmetic number, because the mean of its divisors is an integer number (2959892280).

Almost surely, 2^11806681069 is an apocalyptic number.

It is an amenable number.

11806681069 is a deficient number, since it is larger than the sum of its proper divisors (32888051).

11806681069 is an equidigital number, since it uses as much as digits as its factorization.

11806681069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32888050.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 11806681069 in words is "eleven billion, eight hundred six million, six hundred eighty-one thousand, sixty-nine".