11638135777 has 2 divisors, whose sum is σ = 11638135778. Its totient is φ = 11638135776.

The previous prime is 11638135739. The next prime is 11638135793. The reversal of 11638135777 is 77753183611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11637231376 + 904401 = 107876^2 + 951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11638135777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11638135777.

It is not a weakly prime, because it can be changed into another prime (11638135177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819067888 + 5819067889.

It is an arithmetic number, because the mean of its divisors is an integer number (5819067889).

Almost surely, 2^11638135777 is an apocalyptic number.

It is an amenable number.

11638135777 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638135777 is an equidigital number, since it uses as much as digits as its factorization.

11638135777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 49.

The spelling of 11638135777 in words is "eleven billion, six hundred thirty-eight million, one hundred thirty-five thousand, seven hundred seventy-seven".