8115815466197 has 4 divisors (see below), whose sum is σ = 8115824340876. Its totient is φ = 8115806591520.

The previous prime is 8115815466181. The next prime is 8115815466293. The reversal of 8115815466197 is 7916645185118.

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 can be written as a sum of positive squares in 2 ways, for example, as 3006221951716 + 5109593514481 = 1733846^2 + 2260441^2 .

It is a cyclic number.

It is not a de Polignac number, because 8115815466197 - 2⁴ = 8115815466181 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 (8115815468197) 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, 2884454 + ... + 4954967.

It is an arithmetic number, because the mean of its divisors is an integer number (2028956085219).

Almost surely, 2^{8115815466197} is an apocalyptic number.

It is an amenable number.

8115815466197 is a deficient number, since it is larger than the sum of its proper divisors (8874679).

8115815466197 is a wasteful number, since it uses less digits than its factorization.

8115815466197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8874678.

The product of its digits is 14515200, while the sum is 62.

The spelling of 8115815466197 in words is "eight trillion, one hundred fifteen billion, eight hundred fifteen million, four hundred sixty-six thousand, one hundred ninety-seven".