11311261669 has 2 divisors, whose sum is σ = 11311261670. Its totient is φ = 11311261668.

The previous prime is 11311261651. The next prime is 11311261673. The reversal of 11311261669 is 96616211311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8899469569 + 2411792100 = 94337^2 + 49110^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311261669 - 2¹³ = 11311253477 is a prime.

It is a super-2 number, since 2×11311261669² (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 (11311264669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655630834 + 5655630835.

It is an arithmetic number, because the mean of its divisors is an integer number (5655630835).

Almost surely, 2^11311261669 is an apocalyptic number.

It is an amenable number.

11311261669 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311261669 is an equidigital number, since it uses as much as digits as its factorization.

11311261669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 37.

The spelling of 11311261669 in words is "eleven billion, three hundred eleven million, two hundred sixty-one thousand, six hundred sixty-nine".