720876028609 has 48 divisors (see below), whose sum is σ = 861839319040. Its totient is φ = 600221080800.

The previous prime is 720876028597. The next prime is 720876028619. The reversal of 720876028609 is 906820678027.

It is not a de Polignac number, because 720876028609 - 2²¹ = 720873931457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720876028609.

It is not an unprimeable number, because it can be changed into a prime (720876028619) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80030584 + ... + 80039590.

Almost surely, 2^720876028609 is an apocalyptic number.

It is an amenable number.

720876028609 is a deficient number, since it is larger than the sum of its proper divisors (140963290431).

720876028609 is a wasteful number, since it uses less digits than its factorization.

720876028609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10202 (or 10191 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 720876028609 in words is "seven hundred twenty billion, eight hundred seventy-six million, twenty-eight thousand, six hundred nine".