813015538305 has 16 divisors (see below), whose sum is σ = 1307635467264. Its totient is φ = 431338085120.

The previous prime is 813015538303. The next prime is 813015538351. The reversal of 813015538305 is 503835510318.

It is not a de Polignac number, because 813015538305 - 2¹ = 813015538303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (813015538303) 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 15 ways as a sum of consecutive naturals, for example, 141884664 + ... + 141890393.

It is an arithmetic number, because the mean of its divisors is an integer number (81727216704).

Almost surely, 2^813015538305 is an apocalyptic number.

It is an amenable number.

813015538305 is a deficient number, since it is larger than the sum of its proper divisors (494619928959).

813015538305 is a wasteful number, since it uses less digits than its factorization.

813015538305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283775256.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 813015538305 in words is "eight hundred thirteen billion, fifteen million, five hundred thirty-eight thousand, three hundred five".