11505779713 has 2 divisors, whose sum is σ = 11505779714. Its totient is φ = 11505779712.

The previous prime is 11505779687. The next prime is 11505779729. The reversal of 11505779713 is 31797750511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6343644609 + 5162135104 = 79647^2 + 71848^2 .

It is a cyclic number.

It is not a de Polignac number, because 11505779713 - 2¹⁷ = 11505648641 is a prime.

It is not a weakly prime, because it can be changed into another prime (11505779773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752889856 + 5752889857.

It is an arithmetic number, because the mean of its divisors is an integer number (5752889857).

Almost surely, 2^11505779713 is an apocalyptic number.

It is an amenable number.

11505779713 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505779713 is an equidigital number, since it uses as much as digits as its factorization.

11505779713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 231525, while the sum is 46.

The spelling of 11505779713 in words is "eleven billion, five hundred five million, seven hundred seventy-nine thousand, seven hundred thirteen".