11555116777 has 2 divisors, whose sum is σ = 11555116778. Its totient is φ = 11555116776.

The previous prime is 11555116747. The next prime is 11555116799. The reversal of 11555116777 is 77761155511.

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., 7671832921 + 3883283856 = 87589^2 + 62316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11555116777 is a prime.

It is not a weakly prime, because it can be changed into another prime (11555116747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777558388 + 5777558389.

It is an arithmetic number, because the mean of its divisors is an integer number (5777558389).

Almost surely, 2^11555116777 is an apocalyptic number.

It is an amenable number.

11555116777 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555116777 is an equidigital number, since it uses as much as digits as its factorization.

11555116777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 257250, while the sum is 46.

The spelling of 11555116777 in words is "eleven billion, five hundred fifty-five million, one hundred sixteen thousand, seven hundred seventy-seven".