720700216565 has 24 divisors (see below), whose sum is σ = 1008087796512. Its totient is φ = 493187845920.

The previous prime is 720700216519. The next prime is 720700216679. The reversal of 720700216565 is 565612007027.

It is not a de Polignac number, because 720700216565 - 2¹² = 720700212469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2875259 + ... + 3115848.

It is an arithmetic number, because the mean of its divisors is an integer number (42003658188).

Almost surely, 2^720700216565 is an apocalyptic number.

It is an amenable number.

720700216565 is a deficient number, since it is larger than the sum of its proper divisors (287387579947).

720700216565 is a wasteful number, since it uses less digits than its factorization.

720700216565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5991617 (or 5991610 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 720700216565 in words is "seven hundred twenty billion, seven hundred million, two hundred sixteen thousand, five hundred sixty-five".