8421795533089 has 27 divisors (see below), whose sum is σ = 8670422031411. Its totient is φ = 8180250620400.

The previous prime is 8421795533087. The next prime is 8421795533113. The reversal of 8421795533089 is 9803355971248.

The square root of 8421795533089 is 2902033.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8091561417489 + 330234115600 = 2844567^2 + 574660^2 .

It is not a de Polignac number, because 8421795533089 - 2¹ = 8421795533087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8421795533089.

It is not an unprimeable number, because it can be changed into a prime (8421795533087) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17293214404 + ... + 17293214890.

Almost surely, 2^{8421795533089} is an apocalyptic number.

8421795533089 is the 2902033-rd square number.

8421795533089 is the 1451017-th centered octagonal number.

It is an amenable number.

8421795533089 is a deficient number, since it is larger than the sum of its proper divisors (248626498322).

8421795533089 is an frugal number, since it uses more digits than its factorization.

8421795533089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 64.

Multiplying 8421795533089 by its sum of digits (64), we get a square (538994914117696 = 23216264²).

The spelling of 8421795533089 in words is "eight trillion, four hundred twenty-one billion, seven hundred ninety-five million, five hundred thirty-three thousand, eighty-nine".