11810991053 has 2 divisors, whose sum is σ = 11810991054. Its totient is φ = 11810991052.

The previous prime is 11810991013. The next prime is 11810991067. The reversal of 11810991053 is 35019901811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11506209289 + 304781764 = 107267^2 + 17458^2 .

It is a cyclic number.

It is not a de Polignac number, because 11810991053 - 2¹⁰ = 11810990029 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11810990998 and 11810991016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11810991013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5905495526 + 5905495527.

It is an arithmetic number, because the mean of its divisors is an integer number (5905495527).

Almost surely, 2^11810991053 is an apocalyptic number.

It is an amenable number.

11810991053 is a deficient number, since it is larger than the sum of its proper divisors (1).

11810991053 is an equidigital number, since it uses as much as digits as its factorization.

11810991053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 38.

The spelling of 11810991053 in words is "eleven billion, eight hundred ten million, nine hundred ninety-one thousand, fifty-three".