8556207480820 has 48 divisors (see below), whose sum is σ = 18004652366400. Its totient is φ = 3415510043136.

The previous prime is 8556207480781. The next prime is 8556207480857. The reversal of 8556207480820 is 280847026558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90944524 + ... + 91038556.

It is an arithmetic number, because the mean of its divisors is an integer number (375096924300).

Almost surely, 2^{8556207480820} is an apocalyptic number.

It is an amenable number.

8556207480820 is an abundant number, since it is smaller than the sum of its proper divisors (9448444885580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8556207480820 is a wasteful number, since it uses less digits than its factorization.

8556207480820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103264 (or 103262 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 55.

The spelling of 8556207480820 in words is "eight trillion, five hundred fifty-six billion, two hundred seven million, four hundred eighty thousand, eight hundred twenty".