27780777456911 has 2 divisors, whose sum is σ = 27780777456912. Its totient is φ = 27780777456910.

The previous prime is 27780777456869. The next prime is 27780777456937. The reversal of 27780777456911 is 11965477708772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27780777456911 - 2¹⁰ = 27780777455887 is a prime.

It is a super-2 number, since 2×27780777456911² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27780777476911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13890388728455 + 13890388728456.

It is an arithmetic number, because the mean of its divisors is an integer number (13890388728456).

Almost surely, 2^{27780777456911} is an apocalyptic number.

27780777456911 is a deficient number, since it is larger than the sum of its proper divisors (1).

27780777456911 is an equidigital number, since it uses as much as digits as its factorization.

27780777456911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290424960, while the sum is 71.

The spelling of 27780777456911 in words is "twenty-seven trillion, seven hundred eighty billion, seven hundred seventy-seven million, four hundred fifty-six thousand, nine hundred eleven".