8556207480821 has 32 divisors (see below), whose sum is σ = 11798542818048. Its totient is φ = 5987982205440.

The previous prime is 8556207480781. The next prime is 8556207480857. The reversal of 8556207480821 is 1280847026558.

It is a cyclic number.

It is not a de Polignac number, because 8556207480821 - 2⁶ = 8556207480757 is a prime.

It is a super-3 number, since 3×8556207480821³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8556207480871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115471880 + ... + 115545953.

It is an arithmetic number, because the mean of its divisors is an integer number (368704463064).

Almost surely, 2^{8556207480821} is an apocalyptic number.

It is an amenable number.

8556207480821 is a deficient number, since it is larger than the sum of its proper divisors (3242335337227).

8556207480821 is a wasteful number, since it uses less digits than its factorization.

8556207480821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231017901.

The product of its (nonzero) digits is 8601600, while the sum is 56.

The spelling of 8556207480821 in words is "eight trillion, five hundred fifty-six billion, two hundred seven million, four hundred eighty thousand, eight hundred twenty-one".