720916234417 has 4 divisors (see below), whose sum is σ = 720920562160. Its totient is φ = 720911906676.

The previous prime is 720916234391. The next prime is 720916234427. The reversal of 720916234417 is 714432619027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720916234417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720916234427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903563 + ... + 2250640.

It is an arithmetic number, because the mean of its divisors is an integer number (180230140540).

Almost surely, 2^720916234417 is an apocalyptic number.

It is an amenable number.

720916234417 is a deficient number, since it is larger than the sum of its proper divisors (4327743).

720916234417 is a wasteful number, since it uses less digits than its factorization.

720916234417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327742.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 720916234417 in words is "seven hundred twenty billion, nine hundred sixteen million, two hundred thirty-four thousand, four hundred seventeen".