815493558163 has 4 divisors (see below), whose sum is σ = 815497554168. Its totient is φ = 815489562160.

The previous prime is 815493558149. The next prime is 815493558223. The reversal of 815493558163 is 361855394518.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815493558163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 815493558098 and 815493558107.

It is not an unprimeable number, because it can be changed into a prime (815493558133) 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, 1674418 + ... + 2105863.

It is an arithmetic number, because the mean of its divisors is an integer number (203874388542).

Almost surely, 2^815493558163 is an apocalyptic number.

815493558163 is a deficient number, since it is larger than the sum of its proper divisors (3996005).

815493558163 is a wasteful number, since it uses less digits than its factorization.

815493558163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996004.

The product of its digits is 15552000, while the sum is 58.

The spelling of 815493558163 in words is "eight hundred fifteen billion, four hundred ninety-three million, five hundred fifty-eight thousand, one hundred sixty-three".