815809340392 has 32 divisors (see below), whose sum is σ = 1558753178400. Its totient is φ = 400144290624.

The previous prime is 815809340321. The next prime is 815809340483. The reversal of 815809340392 is 293043908518.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2553883 + ... + 2855509.

It is an arithmetic number, because the mean of its divisors is an integer number (48711036825).

Almost surely, 2^815809340392 is an apocalyptic number.

It is an amenable number.

815809340392 is a deficient number, since it is larger than the sum of its proper divisors (742943838008).

815809340392 is a wasteful number, since it uses less digits than its factorization.

815809340392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308065 (or 308061 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 815809340392 in words is "eight hundred fifteen billion, eight hundred nine million, three hundred forty thousand, three hundred ninety-two".