813125937166 has 16 divisors (see below), whose sum is σ = 1227396729600. Its totient is φ = 403994609208.

The previous prime is 813125937161. The next prime is 813125937187. The reversal of 813125937166 is 661739521318.

It is a super-2 number, since 2×813125937166² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813125937161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1573225 + ... + 2025163.

It is an arithmetic number, because the mean of its divisors is an integer number (76712295600).

Almost surely, 2^813125937166 is an apocalyptic number.

813125937166 is a deficient number, since it is larger than the sum of its proper divisors (414270792434).

813125937166 is a wasteful number, since it uses less digits than its factorization.

813125937166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457623.

The product of its digits is 1632960, while the sum is 52.

The spelling of 813125937166 in words is "eight hundred thirteen billion, one hundred twenty-five million, nine hundred thirty-seven thousand, one hundred sixty-six".