11991741277 has 2 divisors, whose sum is σ = 11991741278. Its totient is φ = 11991741276.

The previous prime is 11991741269. The next prime is 11991741331. The reversal of 11991741277 is 77214719911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11991564036 + 177241 = 109506^2 + 421^2 .

It is a cyclic number.

It is not a de Polignac number, because 11991741277 - 2³ = 11991741269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11991741277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11991741227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5995870638 + 5995870639.

It is an arithmetic number, because the mean of its divisors is an integer number (5995870639).

Almost surely, 2^11991741277 is an apocalyptic number.

It is an amenable number.

11991741277 is a deficient number, since it is larger than the sum of its proper divisors (1).

11991741277 is an equidigital number, since it uses as much as digits as its factorization.

11991741277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 49.

The spelling of 11991741277 in words is "eleven billion, nine hundred ninety-one million, seven hundred forty-one thousand, two hundred seventy-seven".