855663814 has 4 divisors (see below), whose sum is σ = 1283495724. Its totient is φ = 427831906.

The previous prime is 855663761. The next prime is 855663859. The reversal of 855663814 is 418366558.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213915952 + ... + 213915955.

It is an arithmetic number, because the mean of its divisors is an integer number (320873931).

Almost surely, 2^855663814 is an apocalyptic number.

855663814 is a deficient number, since it is larger than the sum of its proper divisors (427831910).

855663814 is a wasteful number, since it uses less digits than its factorization.

855663814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427831909.

The product of its digits is 691200, while the sum is 46.

The square root of 855663814 is about 29251.7318119800. The cubic root of 855663814 is about 949.3675620744.

The spelling of 855663814 in words is "eight hundred fifty-five million, six hundred sixty-three thousand, eight hundred fourteen".