720711171617 has 16 divisors (see below), whose sum is σ = 772832586240. Its totient is φ = 669671987712.

The previous prime is 720711171611. The next prime is 720711171647. The reversal of 720711171617 is 716171117027.

It is a cyclic number.

It is not a de Polignac number, because 720711171617 - 2⁸ = 720711171361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720711171611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28059893 + ... + 28085565.

It is an arithmetic number, because the mean of its divisors is an integer number (48302036640).

Almost surely, 2^720711171617 is an apocalyptic number.

It is an amenable number.

720711171617 is a deficient number, since it is larger than the sum of its proper divisors (52121414623).

720711171617 is a wasteful number, since it uses less digits than its factorization.

720711171617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46672.

The product of its (nonzero) digits is 28812, while the sum is 41.

The spelling of 720711171617 in words is "seven hundred twenty billion, seven hundred eleven million, one hundred seventy-one thousand, six hundred seventeen".