8205621264544 has 48 divisors (see below), whose sum is σ = 17623693202976. Its totient is φ = 3729773536000.

The previous prime is 8205621264539. The next prime is 8205621264667. The reversal of 8205621264544 is 4454621265028.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33528219 + ... + 33772069.

It is an arithmetic number, because the mean of its divisors is an integer number (367160275062).

Almost surely, 2^{8205621264544} is an apocalyptic number.

It is an amenable number.

8205621264544 is an abundant number, since it is smaller than the sum of its proper divisors (9418071938432).

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

8205621264544 is a wasteful number, since it uses less digits than its factorization.

8205621264544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339469 (or 339461 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 49.

The spelling of 8205621264544 in words is "eight trillion, two hundred five billion, six hundred twenty-one million, two hundred sixty-four thousand, five hundred forty-four".