8255404821 has 8 divisors (see below), whose sum is σ = 11012856064. Its totient is φ = 5500778400.

The previous prime is 8255404793. The next prime is 8255404841. The reversal of 8255404821 is 1284045528.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8255404821 - 2⁶ = 8255404757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8255404821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8255404841) 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 7 ways as a sum of consecutive naturals, for example, 699376 + ... + 711081.

It is an arithmetic number, because the mean of its divisors is an integer number (1376607008).

Almost surely, 2^8255404821 is an apocalyptic number.

It is an amenable number.

8255404821 is a deficient number, since it is larger than the sum of its proper divisors (2757451243).

8255404821 is a wasteful number, since it uses less digits than its factorization.

8255404821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412411.

The product of its (nonzero) digits is 102400, while the sum is 39.

The square root of 8255404821 is about 90859.2583119629. The cubic root of 8255404821 is about 2021.0611701261.

The spelling of 8255404821 in words is "eight billion, two hundred fifty-five million, four hundred four thousand, eight hundred twenty-one".