813603536 has 20 divisors (see below), whose sum is σ = 1580010852. Its totient is φ = 405858816.

The previous prime is 813603533. The next prime is 813603547. The reversal of 813603536 is 635306318.

813603536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 464661136 + 348942400 = 21556^2 + 18680^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 813603496 and 813603505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813603533) 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, 51791 + ... + 65646.

Almost surely, 2^813603536 is an apocalyptic number.

It is an amenable number.

813603536 is a deficient number, since it is larger than the sum of its proper divisors (766407316).

813603536 is a wasteful number, since it uses less digits than its factorization.

813603536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117878 (or 117872 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 813603536 is about 28523.7363611432. The cubic root of 813603536 is about 933.5500555684.

The spelling of 813603536 in words is "eight hundred thirteen million, six hundred three thousand, five hundred thirty-six".