855562805 has 18 divisors (see below), whose sum is σ = 1044967446. Its totient is φ = 672468048.

The previous prime is 855562783. The next prime is 855562817. The reversal of 855562805 is 508265558.

It can be written as a sum of positive squares in only one way, i.e., 684450244 + 171112561 = 26162^2 + 13081^2 .

It is not a de Polignac number, because 855562805 - 2¹⁰ = 855561781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6736652 + ... + 6736778.

It is an arithmetic number, because the mean of its divisors is an integer number (58053747).

Almost surely, 2^855562805 is an apocalyptic number.

It is an amenable number.

855562805 is a deficient number, since it is larger than the sum of its proper divisors (189404641).

855562805 is an equidigital number, since it uses as much as digits as its factorization.

855562805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 44.

The square root of 855562805 is about 29250.0052136747. The cubic root of 855562805 is about 949.3302037723.

The spelling of 855562805 in words is "eight hundred fifty-five million, five hundred sixty-two thousand, eight hundred five".