813138688282 has 8 divisors (see below), whose sum is σ = 1291455563796. Its totient is φ = 382653500352.

The previous prime is 813138688267. The next prime is 813138688399. The reversal of 813138688282 is 282886831318.

It can be written as a sum of positive squares in 2 ways, for example, as 668389637601 + 144749050681 = 817551^2 + 380459^2 .

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

It is a super-2 number, since 2×813138688282² (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, 11957921853 + ... + 11957921920.

Almost surely, 2^813138688282 is an apocalyptic number.

813138688282 is a deficient number, since it is larger than the sum of its proper divisors (478316875514).

813138688282 is a wasteful number, since it uses less digits than its factorization.

813138688282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23915843792.

The product of its digits is 7077888, while the sum is 58.

The spelling of 813138688282 in words is "eight hundred thirteen billion, one hundred thirty-eight million, six hundred eighty-eight thousand, two hundred eighty-two".