717489664 has 40 divisors (see below), whose sum is σ = 1438968168. Its totient is φ = 357396480.

The previous prime is 717489653. The next prime is 717489679. The reversal of 717489664 is 466984717.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141379 + ... + 146365.

Almost surely, 2^717489664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 717489664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719484084).

717489664 is an abundant number, since it is smaller than the sum of its proper divisors (721478504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

717489664 is an equidigital number, since it uses as much as digits as its factorization.

717489664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286 (or 5270 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The square root of 717489664 is about 26785.9975360262. The cubic root of 717489664 is about 895.2380852817.

The spelling of 717489664 in words is "seven hundred seventeen million, four hundred eighty-nine thousand, six hundred sixty-four".