27771276553 has 2 divisors, whose sum is σ = 27771276554. Its totient is φ = 27771276552.

The previous prime is 27771276397. The next prime is 27771276571. The reversal of 27771276553 is 35567217772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17522346384 + 10248930169 = 132372^2 + 101237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27771276553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27771276553.

It is not a weakly prime, because it can be changed into another prime (27771276593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885638276 + 13885638277.

It is an arithmetic number, because the mean of its divisors is an integer number (13885638277).

Almost surely, 2^27771276553 is an apocalyptic number.

It is an amenable number.

27771276553 is a deficient number, since it is larger than the sum of its proper divisors (1).

27771276553 is an equidigital number, since it uses as much as digits as its factorization.

27771276553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4321800, while the sum is 52.

The spelling of 27771276553 in words is "twenty-seven billion, seven hundred seventy-one million, two hundred seventy-six thousand, five hundred fifty-three".