722491500025 has 27 divisors (see below), whose sum is σ = 915609641869. Its totient is φ = 565539073280.

The previous prime is 722491500013. The next prime is 722491500131. The reversal of 722491500025 is 520005194227.

The square root of 722491500025 is 849995.

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 412612237801 + 309879262224 = 642349^2 + 556668^2 .

It is not a de Polignac number, because 722491500025 - 2⁷ = 722491499897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 199747017 + ... + 199750633.

Almost surely, 2^722491500025 is an apocalyptic number.

722491500025 is the 849995-th square number.

722491500025 is the 424998-th centered octagonal number.

It is an amenable number.

722491500025 is a deficient number, since it is larger than the sum of its proper divisors (193118141844).

722491500025 is an frugal number, since it uses more digits than its factorization.

722491500025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7338 (or 3669 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 722491500025 in words is "seven hundred twenty-two billion, four hundred ninety-one million, five hundred thousand, twenty-five".