11771609911 has 2 divisors, whose sum is σ = 11771609912. Its totient is φ = 11771609910.

The previous prime is 11771609873. The next prime is 11771609929. The reversal of 11771609911 is 11990617711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11771609911 - 2¹³ = 11771601719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11771609411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5885804955 + 5885804956.

It is an arithmetic number, because the mean of its divisors is an integer number (5885804956).

Almost surely, 2^11771609911 is an apocalyptic number.

11771609911 is a deficient number, since it is larger than the sum of its proper divisors (1).

11771609911 is an equidigital number, since it uses as much as digits as its factorization.

11771609911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 43.

The spelling of 11771609911 in words is "eleven billion, seven hundred seventy-one million, six hundred nine thousand, nine hundred eleven".