720563445 has 80 divisors (see below), whose sum is σ = 1563141888. Its totient is φ = 310003200.

The previous prime is 720563413. The next prime is 720563449. The reversal of 720563445 is 544365027.

720563445 is a `hidden beast` number, since 7 + 205 + 6 + 3 + 445 = 666.

It is not a de Polignac number, because 720563445 - 2⁵ = 720563413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720563449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 40720 + ... + 55670.

Almost surely, 2^720563445 is an apocalyptic number.

It is an amenable number.

720563445 is an abundant number, since it is smaller than the sum of its proper divisors (842578443).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

720563445 is a wasteful number, since it uses less digits than its factorization.

720563445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14992 (or 14983 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 720563445 is about 26843.3128544150. The cubic root of 720563445 is about 896.5146869707.

The spelling of 720563445 in words is "seven hundred twenty million, five hundred sixty-three thousand, four hundred forty-five".