722697928609 has 4 divisors (see below), whose sum is σ = 722703923604. Its totient is φ = 722691933616.

The previous prime is 722697928607. The next prime is 722697928619. The reversal of 722697928609 is 906829796227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 546505347600 + 176192581009 = 739260^2 + 419753^2 .

It is a cyclic number.

It is not a de Polignac number, because 722697928609 - 2¹ = 722697928607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722697928607) 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, 2812882 + ... + 3059035.

It is an arithmetic number, because the mean of its divisors is an integer number (180675980901).

Almost surely, 2^722697928609 is an apocalyptic number.

It is an amenable number.

722697928609 is a deficient number, since it is larger than the sum of its proper divisors (5994995).

722697928609 is a wasteful number, since it uses less digits than its factorization.

722697928609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994994.

The product of its (nonzero) digits is 82301184, while the sum is 67.

The spelling of 722697928609 in words is "seven hundred twenty-two billion, six hundred ninety-seven million, nine hundred twenty-eight thousand, six hundred nine".