813321641194 has 32 divisors (see below), whose sum is σ = 1349480756736. Its totient is φ = 365930549760.

The previous prime is 813321641137. The next prime is 813321641233. The reversal of 813321641194 is 491146123318.

It is a happy number.

It is a super-2 number, since 2×813321641194² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 813321641194.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4561027 + ... + 4735990.

It is an arithmetic number, because the mean of its divisors is an integer number (42171273648).

Almost surely, 2^813321641194 is an apocalyptic number.

813321641194 is a deficient number, since it is larger than the sum of its proper divisors (536159115542).

813321641194 is a wasteful number, since it uses less digits than its factorization.

813321641194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9297150.

The product of its digits is 124416, while the sum is 43.

The spelling of 813321641194 in words is "eight hundred thirteen billion, three hundred twenty-one million, six hundred forty-one thousand, one hundred ninety-four".