8198435350681 has 3 divisors (see below), whose sum is σ = 8198438213973. Its totient is φ = 8198432487390.

The previous prime is 8198435350673. The next prime is 8198435350687. The reversal of 8198435350681 is 1860535348918.

The square root of 8198435350681 is 2863291.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 8198435350681 - 2³ = 8198435350673 is a prime.

It is a super-2 number, since 2×8198435350681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8198435350687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1431646 + ... + 4294936.

It is an arithmetic number, because the mean of its divisors is an integer number (2732812737991).

Almost surely, 2^{8198435350681} is an apocalyptic number.

8198435350681 is the 2863291-st square number.

8198435350681 is the 1431646-th centered octagonal number.

It is an amenable number.

8198435350681 is a deficient number, since it is larger than the sum of its proper divisors (2863292).

8198435350681 is an frugal number, since it uses more digits than its factorization.

8198435350681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726582 (or 2863291 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 8198435350681 in words is "eight trillion, one hundred ninety-eight billion, four hundred thirty-five million, three hundred fifty thousand, six hundred eighty-one".