720063556 has 9 divisors (see below), whose sum is σ = 1260205149. Its totient is φ = 360004944.

The previous prime is 720063523. The next prime is 720063569. The reversal of 720063556 is 655360027.

The square root of 720063556 is 26834.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 269944900 + 450118656 = 16430^2 + 21216^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 46960 + ... + 60376.

Almost surely, 2^720063556 is an apocalyptic number.

720063556 is the 26834-th square number.

It is an amenable number.

720063556 is a deficient number, since it is larger than the sum of its proper divisors (540141593).

720063556 is an frugal number, since it uses more digits than its factorization.

720063556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26838 (or 13419 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 34.

The cubic root of 720063556 is about 896.3073207725.

It can be divided in two parts, 7200 and 63556, that added together give a square (70756 = 266²).

The spelling of 720063556 in words is "seven hundred twenty million, sixty-three thousand, five hundred fifty-six".