11811318469 has 2 divisors, whose sum is σ = 11811318470. Its totient is φ = 11811318468.

The previous prime is 11811318439. The next prime is 11811318481. The reversal of 11811318469 is 96481311811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11267822500 + 543495969 = 106150^2 + 23313^2 .

It is a cyclic number.

It is not a de Polignac number, because 11811318469 - 2¹⁹ = 11810794181 is a prime.

It is a super-2 number, since 2×11811318469² (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 (11811318419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5905659234 + 5905659235.

It is an arithmetic number, because the mean of its divisors is an integer number (5905659235).

Almost surely, 2^11811318469 is an apocalyptic number.

It is an amenable number.

11811318469 is a deficient number, since it is larger than the sum of its proper divisors (1).

11811318469 is an equidigital number, since it uses as much as digits as its factorization.

11811318469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 43.

The spelling of 11811318469 in words is "eleven billion, eight hundred eleven million, three hundred eighteen thousand, four hundred sixty-nine".