720605743225 has 9 divisors (see below), whose sum is σ = 893556384717. Its totient is φ = 576481199040.

The previous prime is 720605743177. The next prime is 720605743243. The reversal of 720605743225 is 522347506027.

The square root of 720605743225 is 848885.

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

It can be written as a sum of positive squares in 4 ways, for example, as 43335997929 + 677269745296 = 208173^2 + 822964^2 .

It is not a de Polignac number, because 720605743225 - 2⁷ = 720605743097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4159537 + ... + 4329313.

Almost surely, 2^720605743225 is an apocalyptic number.

720605743225 is the 848885-th square number.

720605743225 is the 424443-rd centered octagonal number.

It is an amenable number.

720605743225 is a deficient number, since it is larger than the sum of its proper divisors (172950641492).

720605743225 is an frugal number, since it uses more digits than its factorization.

720605743225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339564 (or 169782 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 43.

The spelling of 720605743225 in words is "seven hundred twenty billion, six hundred five million, seven hundred forty-three thousand, two hundred twenty-five".