720564845 has 96 divisors (see below), whose sum is σ = 1198302336.
Its totient is φ = 408844800.
The previous prime is 720564841. The next prime is 720564847. The reversal of 720564845 is 548465027.
It can be divided in two parts, 7205 and 64845, that multiplied together give a square (467208225 = 216152).
It is not a de Polignac number, because 720564845 - 22 = 720564841 is a prime.
720564845 is a modest number, since divided by 64845 gives 7205 as remainder.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (720564841) by changing a digit.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4589507 + ... + 4589663.
It is an arithmetic number, because the mean of its divisors is an integer number (12482316).
Almost surely, 2720564845 is an apocalyptic number.
It is an amenable number.
720564845 is a deficient number, since it is larger than the sum of its proper divisors (477737491).
720564845 is a wasteful number, since it uses less digits than its factorization.
720564845 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 331 (or 324 counting only the distinct ones).
The product of its (nonzero) digits is 268800, while the sum is 41.
The square root of 720564845 is about 26843.3389316605.
The cubic root of 720564845 is about 896.5152675903.
The spelling of 720564845 in words is "seven hundred twenty million, five hundred sixty-four thousand, eight hundred forty-five".