817397710945 has 64 divisors (see below), whose sum is σ = 1083324211200. Its totient is φ = 589692026880.

The previous prime is 817397710937. The next prime is 817397710951. The reversal of 817397710945 is 549017793718.

It is not a de Polignac number, because 817397710945 - 2³ = 817397710937 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 151732542 + ... + 151737928.

It is an arithmetic number, because the mean of its divisors is an integer number (16926940800).

Almost surely, 2^817397710945 is an apocalyptic number.

It is an amenable number.

817397710945 is a deficient number, since it is larger than the sum of its proper divisors (265926500255).

817397710945 is a wasteful number, since it uses less digits than its factorization.

817397710945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6278.

The product of its (nonzero) digits is 13335840, while the sum is 61.

The spelling of 817397710945 in words is "eight hundred seventeen billion, three hundred ninety-seven million, seven hundred ten thousand, nine hundred forty-five".