8720317445 has 16 divisors (see below), whose sum is σ = 11964492288. Its totient is φ = 5977046400.

The previous prime is 8720317439. The next prime is 8720317471. The reversal of 8720317445 is 5447130278.

It is not a de Polignac number, because 8720317445 - 2⁸ = 8720317189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29297 + ... + 135273.

It is an arithmetic number, because the mean of its divisors is an integer number (747780768).

Almost surely, 2^8720317445 is an apocalyptic number.

It is an amenable number.

8720317445 is a deficient number, since it is larger than the sum of its proper divisors (3244174843).

8720317445 is a wasteful number, since it uses less digits than its factorization.

8720317445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108340.

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 8720317445 is about 93382.6399551865. The cubic root of 8720317445 is about 2058.3099096083.

The spelling of 8720317445 in words is "eight billion, seven hundred twenty million, three hundred seventeen thousand, four hundred forty-five".