8197112908885 has 4 divisors (see below), whose sum is σ = 9836535490668. Its totient is φ = 6557690327104.

The previous prime is 8197112908823. The next prime is 8197112908889. The reversal of 8197112908885 is 5888092117918.

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 3473310597124 + 4723802311761 = 1863682^2 + 2173431^2 .

It is a cyclic number.

It is not a de Polignac number, because 8197112908885 - 2²⁹ = 8196576037973 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 8197112908885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8197112908889) 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, 819711290884 + ... + 819711290893.

It is an arithmetic number, because the mean of its divisors is an integer number (2459133872667).

Almost surely, 2^{8197112908885} is an apocalyptic number.

It is an amenable number.

8197112908885 is a deficient number, since it is larger than the sum of its proper divisors (1639422581783).

8197112908885 is a wasteful number, since it uses less digits than its factorization.

8197112908885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639422581782.

The product of its (nonzero) digits is 23224320, while the sum is 67.

The spelling of 8197112908885 in words is "eight trillion, one hundred ninety-seven billion, one hundred twelve million, nine hundred eight thousand, eight hundred eighty-five".