813639327378 has 8 divisors (see below), whose sum is σ = 1627278654768. Its totient is φ = 271213109124.

The previous prime is 813639327359. The next prime is 813639327383. The reversal of 813639327378 is 873723936318.

It is a sphenic number, since it is the product of 3 distinct primes.

813639327378 is an admirable number.

It is a super-2 number, since 2×813639327378² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67803277276 + ... + 67803277287.

It is an arithmetic number, because the mean of its divisors is an integer number (203409831846).

Almost surely, 2^813639327378 is an apocalyptic number.

813639327378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813639327378 is a wasteful number, since it uses less digits than its factorization.

813639327378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135606554568.

The product of its digits is 27433728, while the sum is 60.

The spelling of 813639327378 in words is "eight hundred thirteen billion, six hundred thirty-nine million, three hundred twenty-seven thousand, three hundred seventy-eight".