815274327138 has 32 divisors (see below), whose sum is σ = 1674948283200. Its totient is φ = 264361072320.

The previous prime is 815274327097. The next prime is 815274327143. The reversal of 815274327138 is 831723472518.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771868 + ... + 1492088.

It is an arithmetic number, because the mean of its divisors is an integer number (52342133850).

Almost surely, 2^815274327138 is an apocalyptic number.

815274327138 is an abundant number, since it is smaller than the sum of its proper divisors (859673956062).

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

815274327138 is a wasteful number, since it uses less digits than its factorization.

815274327138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725362.

The product of its digits is 2257920, while the sum is 51.

The spelling of 815274327138 in words is "eight hundred fifteen billion, two hundred seventy-four million, three hundred twenty-seven thousand, one hundred thirty-eight".