815603393312 has 24 divisors (see below), whose sum is σ = 1605764569500. Its totient is φ = 407790169344.

The previous prime is 815603393303. The next prime is 815603393317. The reversal of 815603393312 is 213393306518.

It can be written as a sum of positive squares in 2 ways, for example, as 809272963216 + 6330430096 = 899596^2 + 79564^2 .

It is not an unprimeable number, because it can be changed into a prime (815603393317) 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 3 ways as a sum of consecutive naturals, for example, 852314 + ... + 1535462.

Almost surely, 2^815603393312 is an apocalyptic number.

It is an amenable number.

815603393312 is a deficient number, since it is larger than the sum of its proper divisors (790161176188).

815603393312 is a wasteful number, since it uses less digits than its factorization.

815603393312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720468 (or 720460 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 815603393312 in words is "eight hundred fifteen billion, six hundred three million, three hundred ninety-three thousand, three hundred twelve".