11800679981 has 2 divisors, whose sum is σ = 11800679982. Its totient is φ = 11800679980.

The previous prime is 11800679963. The next prime is 11800680011. The reversal of 11800679981 is 18997600811.

11800679981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11199988900 + 600691081 = 105830^2 + 24509^2 .

It is a cyclic number.

It is not a de Polignac number, because 11800679981 - 2²² = 11796485677 is a prime.

It is a super-2 number, since 2×11800679981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11800679921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5900339990 + 5900339991.

It is an arithmetic number, because the mean of its divisors is an integer number (5900339991).

Almost surely, 2^11800679981 is an apocalyptic number.

It is an amenable number.

11800679981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11800679981 is an equidigital number, since it uses as much as digits as its factorization.

11800679981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 50.

The spelling of 11800679981 in words is "eleven billion, eight hundred million, six hundred seventy-nine thousand, nine hundred eighty-one".