855416905 has 16 divisors (see below), whose sum is σ = 1178277120. Its totient is φ = 584004672.

The previous prime is 855416899. The next prime is 855416909. The reversal of 855416905 is 509614558.

It is a cyclic number.

It is not a de Polignac number, because 855416905 - 2⁷ = 855416777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855416909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45349 + ... + 61378.

It is an arithmetic number, because the mean of its divisors is an integer number (73642320).

Almost surely, 2^855416905 is an apocalyptic number.

It is an amenable number.

855416905 is a deficient number, since it is larger than the sum of its proper divisors (322860215).

855416905 is a wasteful number, since it uses less digits than its factorization.

855416905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106968.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 855416905 is about 29247.5110906894. The cubic root of 855416905 is about 949.2762372878.

The spelling of 855416905 in words is "eight hundred fifty-five million, four hundred sixteen thousand, nine hundred five".