720322687813 has 6 divisors (see below), whose sum is σ = 753002734694. Its totient is φ = 689004309576.

The previous prime is 720322687757. The next prime is 720322687837. The reversal of 720322687813 is 318786223027.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 628693581604 + 91629106209 = 792902^2 + 302703^2 .

It is a de Polignac number, because none of the positive numbers 2^k-720322687813 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 (720322682813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 680833770 + ... + 680834827.

Almost surely, 2^720322687813 is an apocalyptic number.

It is an amenable number.

720322687813 is a deficient number, since it is larger than the sum of its proper divisors (32680046881).

720322687813 is a wasteful number, since it uses less digits than its factorization.

720322687813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361668643 (or 1361668620 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 720322687813 in words is "seven hundred twenty billion, three hundred twenty-two million, six hundred eighty-seven thousand, eight hundred thirteen".