255473644433 has 4 divisors (see below), whose sum is σ = 291969879360. Its totient is φ = 218977409508.

The previous prime is 255473644421. The next prime is 255473644451. The reversal of 255473644433 is 334446374552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255473644433 - 2⁴ = 255473644417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255473604433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18248117453 + ... + 18248117466.

It is an arithmetic number, because the mean of its divisors is an integer number (72992469840).

Almost surely, 2^255473644433 is an apocalyptic number.

It is an amenable number.

255473644433 is a deficient number, since it is larger than the sum of its proper divisors (36496234927).

255473644433 is an equidigital number, since it uses as much as digits as its factorization.

255473644433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36496234926.

The product of its digits is 14515200, while the sum is 50.

The spelling of 255473644433 in words is "two hundred fifty-five billion, four hundred seventy-three million, six hundred forty-four thousand, four hundred thirty-three".