720020238517 has 8 divisors (see below), whose sum is σ = 744334928640. Its totient is φ = 695773562880.

The previous prime is 720020238473. The next prime is 720020238557. The reversal of 720020238517 is 715832020027.

720020238517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-720020238517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720020238557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16982092 + ... + 17024437.

It is an arithmetic number, because the mean of its divisors is an integer number (93041866080).

Almost surely, 2^720020238517 is an apocalyptic number.

It is an amenable number.

720020238517 is a deficient number, since it is larger than the sum of its proper divisors (24314690123).

720020238517 is a wasteful number, since it uses less digits than its factorization.

720020238517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34007243.

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 720020238517 in words is "seven hundred twenty billion, twenty million, two hundred thirty-eight thousand, five hundred seventeen".