720550005 has 16 divisors (see below), whose sum is σ = 1317577344. Its totient is φ = 329394240.

The previous prime is 720549953. The next prime is 720550009. The reversal of 720550005 is 500055027.

It is not a de Polignac number, because 720550005 - 2¹⁰ = 720548981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720550009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3431086 + ... + 3431295.

It is an arithmetic number, because the mean of its divisors is an integer number (82348584).

Almost surely, 2^720550005 is an apocalyptic number.

It is an amenable number.

720550005 is a deficient number, since it is larger than the sum of its proper divisors (597027339).

720550005 is a wasteful number, since it uses less digits than its factorization.

720550005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6862396.

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 720550005 is about 26843.0625115690. The cubic root of 720550005 is about 896.5091129844.

It can be divided in two parts, 720 and 550005, that added together give a triangular number (550725 = T₁₀₄₉).

The spelling of 720550005 in words is "seven hundred twenty million, five hundred fifty thousand, five".