855451633 has 4 divisors (see below), whose sum is σ = 864270820. Its totient is φ = 846632448.

The previous prime is 855451631. The next prime is 855451661. The reversal of 855451633 is 336154558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 336154558 = 2 ⋅168077279.

It can be written as a sum of positive squares in 2 ways, for example, as 466257649 + 389193984 = 21593^2 + 19728^2 .

It is a cyclic number.

It is not a de Polignac number, because 855451633 - 2¹ = 855451631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855451631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4409448 + ... + 4409641.

It is an arithmetic number, because the mean of its divisors is an integer number (216067705).

Almost surely, 2^855451633 is an apocalyptic number.

It is an amenable number.

855451633 is a deficient number, since it is larger than the sum of its proper divisors (8819187).

855451633 is an equidigital number, since it uses as much as digits as its factorization.

855451633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8819186.

The product of its digits is 216000, while the sum is 40.

The square root of 855451633 is about 29248.1047762073. The cubic root of 855451633 is about 949.2890832731.

It can be divided in two parts, 85545 and 1633, that added together give a palindrome (87178).

The spelling of 855451633 in words is "eight hundred fifty-five million, four hundred fifty-one thousand, six hundred thirty-three".