717420858049 has 9 divisors (see below), whose sum is σ = 834557691171. Its totient is φ = 614927082000.

The previous prime is 717420858001. The next prime is 717420858079. The reversal of 717420858049 is 940858024717.

The square root of 717420858049 is 847007.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 399099218049 + 318321640000 = 631743^2 + 564200^2 .

It is not a de Polignac number, because 717420858049 - 2⁷ = 717420857921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (717420858079) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5868549 + ... + 5989549.

Almost surely, 2^717420858049 is an apocalyptic number.

717420858049 is the 847007-th square number.

717420858049 is the 423504-th centered octagonal number.

It is an amenable number.

717420858049 is a deficient number, since it is larger than the sum of its proper divisors (117136833122).

717420858049 is an frugal number, since it uses more digits than its factorization.

717420858049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242016 (or 121008 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 717420858049 in words is "seven hundred seventeen billion, four hundred twenty million, eight hundred fifty-eight thousand, forty-nine".