720562545 has 12 divisors (see below), whose sum is σ = 1248975156. Its totient is φ = 384300000.

The previous prime is 720562541. The next prime is 720562571. The reversal of 720562545 is 545265027.

720562545 is a `hidden beast` number, since 7 + 20 + 5 + 625 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 325189089 + 395373456 = 18033^2 + 19884^2 .

It is not a de Polignac number, because 720562545 - 2² = 720562541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720562541) 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 11 ways as a sum of consecutive naturals, for example, 8006206 + ... + 8006295.

It is an arithmetic number, because the mean of its divisors is an integer number (104081263).

Almost surely, 2^720562545 is an apocalyptic number.

It is an amenable number.

720562545 is a deficient number, since it is larger than the sum of its proper divisors (528412611).

720562545 is a wasteful number, since it uses less digits than its factorization.

720562545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16012512 (or 16012509 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 720562545 is about 26843.2960904580. The cubic root of 720562545 is about 896.5143137149.

The spelling of 720562545 in words is "seven hundred twenty million, five hundred sixty-two thousand, five hundred forty-five".