815800217116 has 96 divisors (see below), whose sum is σ = 1532874792960. Its totient is φ = 379223116800.

The previous prime is 815800217087. The next prime is 815800217143. The reversal of 815800217116 is 611712008518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 302932266 + ... + 302934958.

It is an arithmetic number, because the mean of its divisors is an integer number (15967445760).

Almost surely, 2^815800217116 is an apocalyptic number.

It is an amenable number.

815800217116 is a deficient number, since it is larger than the sum of its proper divisors (717074575844).

815800217116 is a wasteful number, since it uses less digits than its factorization.

815800217116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715 (or 3713 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 40.

The spelling of 815800217116 in words is "eight hundred fifteen billion, eight hundred million, two hundred seventeen thousand, one hundred sixteen".