11662211789 has 2 divisors, whose sum is σ = 11662211790. Its totient is φ = 11662211788.

The previous prime is 11662211741. The next prime is 11662211809. The reversal of 11662211789 is 98711226611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10997087689 + 665124100 = 104867^2 + 25790^2 .

It is a cyclic number.

It is not a de Polignac number, because 11662211789 - 2¹⁶ = 11662146253 is a prime.

It is a super-2 number, since 2×11662211789² (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 (11662213789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831105894 + 5831105895.

It is an arithmetic number, because the mean of its divisors is an integer number (5831105895).

Almost surely, 2^11662211789 is an apocalyptic number.

It is an amenable number.

11662211789 is a deficient number, since it is larger than the sum of its proper divisors (1).

11662211789 is an equidigital number, since it uses as much as digits as its factorization.

11662211789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The spelling of 11662211789 in words is "eleven billion, six hundred sixty-two million, two hundred eleven thousand, seven hundred eighty-nine".