55646605577 has 2 divisors, whose sum is σ = 55646605578. Its totient is φ = 55646605576.

The previous prime is 55646605571. The next prime is 55646605579. The reversal of 55646605577 is 77550664655.

55646605577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43891926016 + 11754679561 = 209504^2 + 108419^2 .

It is a cyclic number.

It is not a de Polignac number, because 55646605577 - 2¹⁰ = 55646604553 is a prime.

Together with 55646605579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55646605571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27823302788 + 27823302789.

It is an arithmetic number, because the mean of its divisors is an integer number (27823302789).

Almost surely, 2^55646605577 is an apocalyptic number.

It is an amenable number.

55646605577 is a deficient number, since it is larger than the sum of its proper divisors (1).

55646605577 is an equidigital number, since it uses as much as digits as its factorization.

55646605577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460000, while the sum is 56.

The spelling of 55646605577 in words is "fifty-five billion, six hundred forty-six million, six hundred five thousand, five hundred seventy-seven".