855654819 has 4 divisors (see below), whose sum is σ = 1140873096. Its totient is φ = 570436544.

The previous prime is 855654799. The next prime is 855654847. The reversal of 855654819 is 918456558.

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

It is a cyclic number.

It is not a de Polignac number, because 855654819 - 2¹¹ = 855652771 is a prime.

It is a super-2 number, since 2×855654819² = 1464290338555845522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (855654619) 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, 142609134 + ... + 142609139.

It is an arithmetic number, because the mean of its divisors is an integer number (285218274).

Almost surely, 2^855654819 is an apocalyptic number.

855654819 is a deficient number, since it is larger than the sum of its proper divisors (285218277).

855654819 is a wasteful number, since it uses less digits than its factorization.

855654819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285218276.

The product of its digits is 1728000, while the sum is 51.

The square root of 855654819 is about 29251.5780599953. The cubic root of 855654819 is about 949.3642353819.

The spelling of 855654819 in words is "eight hundred fifty-five million, six hundred fifty-four thousand, eight hundred nineteen".