855291163 has 4 divisors (see below), whose sum is σ = 855349768. Its totient is φ = 855232560.

The previous prime is 855291161. The next prime is 855291169. The reversal of 855291163 is 361192558.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 361192558 = 2 ⋅180596279.

It is a cyclic number.

It is not a de Polignac number, because 855291163 - 2¹ = 855291161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855291161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11920 + ... + 43042.

It is an arithmetic number, because the mean of its divisors is an integer number (213837442).

Almost surely, 2^855291163 is an apocalyptic number.

855291163 is a deficient number, since it is larger than the sum of its proper divisors (58605).

855291163 is a wasteful number, since it uses less digits than its factorization.

855291163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58604.

The product of its digits is 64800, while the sum is 40.

The square root of 855291163 is about 29245.3613928773. The cubic root of 855291163 is about 949.2297220580.

The spelling of 855291163 in words is "eight hundred fifty-five million, two hundred ninety-one thousand, one hundred sixty-three".