720564871 has 16 divisors (see below), whose sum is σ = 791078400. Its totient is φ = 652307040.

The previous prime is 720564851. The next prime is 720564877. The reversal of 720564871 is 178465027.

It is a cyclic number.

It is not a de Polignac number, because 720564871 - 2⁹ = 720564359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720564877) 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, 181716 + ... + 185638.

It is an arithmetic number, because the mean of its divisors is an integer number (49442400).

Almost surely, 2^720564871 is an apocalyptic number.

720564871 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

720564871 is a deficient number, since it is larger than the sum of its proper divisors (70513529).

720564871 is a wasteful number, since it uses less digits than its factorization.

720564871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 720564871 is about 26843.3394159520. The cubic root of 720564871 is about 896.5152783732.

The spelling of 720564871 in words is "seven hundred twenty million, five hundred sixty-four thousand, eight hundred seventy-one".