7947722500 has 45 divisors (see below), whose sum is σ = 17389832691. Its totient is φ = 3177306000.

The previous prime is 7947722459. The next prime is 7947722521. The reversal of 7947722500 is 52277497.

The square root of 7947722500 is 89150.

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

It can be written as a sum of positive squares in 2 ways, for example, as 623101444 + 7324621056 = 24962^2 + 85584^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4456609 + ... + 4458391.

Almost surely, 2^7947722500 is an apocalyptic number.

7947722500 is the 89150-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7947722500

7947722500 is an abundant number, since it is smaller than the sum of its proper divisors (9442110191).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7947722500 is an frugal number, since it uses more digits than its factorization.

7947722500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590 (or 1790 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The cubic root of 7947722500 is about 1995.6340177012.

Adding to 7947722500 its reverse (52277497), we get a palindrome (7999999997).

The spelling of 7947722500 in words is "seven billion, nine hundred forty-seven million, seven hundred twenty-two thousand, five hundred".