11982081889 has 2 divisors, whose sum is σ = 11982081890. Its totient is φ = 11982081888.

The previous prime is 11982081871. The next prime is 11982081949. The reversal of 11982081889 is 98818028911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8720758225 + 3261323664 = 93385^2 + 57108^2 .

It is a cyclic number.

It is not a de Polignac number, because 11982081889 - 2⁵ = 11982081857 is a prime.

It is not a weakly prime, because it can be changed into another prime (11982081809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5991040944 + 5991040945.

It is an arithmetic number, because the mean of its divisors is an integer number (5991040945).

Almost surely, 2^11982081889 is an apocalyptic number.

It is an amenable number.

11982081889 is a deficient number, since it is larger than the sum of its proper divisors (1).

11982081889 is an equidigital number, since it uses as much as digits as its factorization.

11982081889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 55.

The spelling of 11982081889 in words is "eleven billion, nine hundred eighty-two million, eighty-one thousand, eight hundred eighty-nine".