8216634481597 has 4 divisors (see below), whose sum is σ = 8216808872220. Its totient is φ = 8216460090976.

The previous prime is 8216634481591. The next prime is 8216634481637. The reversal of 8216634481597 is 7951844366128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2228732495236 + 5987901986361 = 1492894^2 + 2447019^2 .

It is a cyclic number.

It is not a de Polignac number, because 8216634481597 - 2¹⁹ = 8216633957309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8216634481591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87124618 + ... + 87218875.

It is an arithmetic number, because the mean of its divisors is an integer number (2054202218055).

Almost surely, 2^{8216634481597} is an apocalyptic number.

It is an amenable number.

8216634481597 is a deficient number, since it is larger than the sum of its proper divisors (174390623).

8216634481597 is a wasteful number, since it uses less digits than its factorization.

8216634481597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174390622.

The product of its digits is 69672960, while the sum is 64.

The spelling of 8216634481597 in words is "eight trillion, two hundred sixteen billion, six hundred thirty-four million, four hundred eighty-one thousand, five hundred ninety-seven".