11111611669 has 2 divisors, whose sum is σ = 11111611670. Its totient is φ = 11111611668.

The previous prime is 11111611663. The next prime is 11111611681. The reversal of 11111611669 is 96611611111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10431966769 + 679644900 = 102137^2 + 26070^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111611669 - 2¹⁹ = 11111087381 is a prime.

It is a super-2 number, since 2×11111611669² (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 (11111611663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555805834 + 5555805835.

It is an arithmetic number, because the mean of its divisors is an integer number (5555805835).

Almost surely, 2^11111611669 is an apocalyptic number.

It is an amenable number.

11111611669 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111611669 is an equidigital number, since it uses as much as digits as its factorization.

11111611669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 34.

The spelling of 11111611669 in words is "eleven billion, one hundred eleven million, six hundred eleven thousand, six hundred sixty-nine".