855505055567 has 2 divisors, whose sum is σ = 855505055568. Its totient is φ = 855505055566.

The previous prime is 855505055551. The next prime is 855505055593. The reversal of 855505055567 is 765550505558.

855505055567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855505055567 - 2⁴ = 855505055551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855505055507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427752527783 + 427752527784.

It is an arithmetic number, because the mean of its divisors is an integer number (427752527784).

Almost surely, 2^855505055567 is an apocalyptic number.

855505055567 is a deficient number, since it is larger than the sum of its proper divisors (1).

855505055567 is an equidigital number, since it uses as much as digits as its factorization.

855505055567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26250000, while the sum is 56.

The spelling of 855505055567 in words is "eight hundred fifty-five billion, five hundred five million, fifty-five thousand, five hundred sixty-seven".