722389504225 has 9 divisors (see below), whose sum is σ = 895768254867. Its totient is φ = 577908203640.

The previous prime is 722389504211. The next prime is 722389504247. The reversal of 722389504225 is 522405983227.

The square root of 722389504225 is 849935.

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., 260060221521 + 462329282704 = 509961^2 + 679948^2 .

It is not a de Polignac number, because 722389504225 - 2²⁵ = 722355949793 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, 4164682 + ... + 4334668.

Almost surely, 2^722389504225 is an apocalyptic number.

722389504225 is the 849935-th square number.

722389504225 is the 424968-th centered octagonal number.

It is an amenable number.

722389504225 is a deficient number, since it is larger than the sum of its proper divisors (173378750642).

722389504225 is an frugal number, since it uses more digits than its factorization.

722389504225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339984 (or 169992 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

Multiplying 722389504225 by its sum of digits (49), we get a square (35397085707025 = 5949545²).

The spelling of 722389504225 in words is "seven hundred twenty-two billion, three hundred eighty-nine million, five hundred four thousand, two hundred twenty-five".