211186536989 has 2 divisors, whose sum is σ = 211186536990. Its totient is φ = 211186536988.

The previous prime is 211186536877. The next prime is 211186537019. The reversal of 211186536989 is 989635681112.

211186536989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205805580964 + 5380956025 = 453658^2 + 73355^2 .

It is a cyclic number.

It is not a de Polignac number, because 211186536989 - 2¹⁶ = 211186471453 is a prime.

It is a super-2 number, since 2×211186536989² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211186536689) 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 as a sum of consecutive naturals, namely, 105593268494 + 105593268495.

It is an arithmetic number, because the mean of its divisors is an integer number (105593268495).

Almost surely, 2^211186536989 is an apocalyptic number.

It is an amenable number.

211186536989 is a deficient number, since it is larger than the sum of its proper divisors (1).

211186536989 is an equidigital number, since it uses as much as digits as its factorization.

211186536989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 59.

The spelling of 211186536989 in words is "two hundred eleven billion, one hundred eighty-six million, five hundred thirty-six thousand, nine hundred eighty-nine".