8556021841 has 4 divisors (see below), whose sum is σ = 9006338800. Its totient is φ = 8105704884.

The previous prime is 8556021823. The next prime is 8556021941. The reversal of 8556021841 is 1481206558.

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 8556021841 - 2⁵ = 8556021809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8556021794 and 8556021803.

It is not an unprimeable number, because it can be changed into a prime (8556021941) 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, 225158451 + ... + 225158488.

It is an arithmetic number, because the mean of its divisors is an integer number (2251584700).

Almost surely, 2^8556021841 is an apocalyptic number.

It is an amenable number.

8556021841 is a deficient number, since it is larger than the sum of its proper divisors (450316959).

8556021841 is a wasteful number, since it uses less digits than its factorization.

8556021841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450316958.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 8556021841 is about 92498.7666998863. The cubic root of 8556021841 is about 2045.3013021219.

The spelling of 8556021841 in words is "eight billion, five hundred fifty-six million, twenty-one thousand, eight hundred forty-one".