717919906856 has 64 divisors (see below), whose sum is σ = 1393211473920. Its totient is φ = 346679101440.

The previous prime is 717919906843. The next prime is 717919906859. The reversal of 717919906856 is 658609919717.

It is not an unprimeable number, because it can be changed into a prime (717919906859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5411801 + ... + 5542871.

It is an arithmetic number, because the mean of its divisors is an integer number (21768929280).

Almost surely, 2^717919906856 is an apocalyptic number.

It is an amenable number.

717919906856 is a deficient number, since it is larger than the sum of its proper divisors (675291567064).

717919906856 is a wasteful number, since it uses less digits than its factorization.

717919906856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131346 (or 131342 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 68.

The spelling of 717919906856 in words is "seven hundred seventeen billion, nine hundred nineteen million, nine hundred six thousand, eight hundred fifty-six".