855775818263 has 2 divisors, whose sum is σ = 855775818264. Its totient is φ = 855775818262.

The previous prime is 855775818223. The next prime is 855775818277. The reversal of 855775818263 is 362818577558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855775818263 - 2²⁰ = 855774769687 is a prime.

It is a super-2 number, since 2×855775818263² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 855775818263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855775818223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427887909131 + 427887909132.

It is an arithmetic number, because the mean of its divisors is an integer number (427887909132).

Almost surely, 2^855775818263 is an apocalyptic number.

855775818263 is a deficient number, since it is larger than the sum of its proper divisors (1).

855775818263 is an equidigital number, since it uses as much as digits as its factorization.

855775818263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896000, while the sum is 65.

The spelling of 855775818263 in words is "eight hundred fifty-five billion, seven hundred seventy-five million, eight hundred eighteen thousand, two hundred sixty-three".