717589505979 has 6 divisors (see below), whose sum is σ = 1036518175316. Its totient is φ = 478393003980.

The previous prime is 717589505959. The next prime is 717589505981. The reversal of 717589505979 is 979505985717.

It is not a de Polignac number, because 717589505979 - 2⁸ = 717589505723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (717589505959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39866083657 + ... + 39866083674.

Almost surely, 2^717589505979 is an apocalyptic number.

717589505979 is a deficient number, since it is larger than the sum of its proper divisors (318928669337).

717589505979 is a wasteful number, since it uses less digits than its factorization.

717589505979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79732167337 (or 79732167334 counting only the distinct ones).

The product of its (nonzero) digits is 250047000, while the sum is 72.

The spelling of 717589505979 in words is "seven hundred seventeen billion, five hundred eighty-nine million, five hundred five thousand, nine hundred seventy-nine".