7521759725 has 18 divisors (see below), whose sum is σ = 9651598590. Its totient is φ = 5808107200.

The previous prime is 7521759719. The next prime is 7521759733. The reversal of 7521759725 is 5279571257.

It can be written as a sum of positive squares in 9 ways, for example, as 409536169 + 7112223556 = 20237^2 + 84334^2 .

It is not a de Polignac number, because 7521759725 - 2¹⁶ = 7521694189 is a prime.

It is a congruent 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 17 ways as a sum of consecutive naturals, for example, 2333615 + ... + 2336835.

Almost surely, 2^7521759725 is an apocalyptic number.

It is an amenable number.

7521759725 is a deficient number, since it is larger than the sum of its proper divisors (2129838865).

7521759725 is an frugal number, since it uses more digits than its factorization.

7521759725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6481 (or 3255 counting only the distinct ones).

The product of its digits is 1543500, while the sum is 50.

The square root of 7521759725 is about 86728.0792189012. The cubic root of 7521759725 is about 1959.3250248533.

The spelling of 7521759725 in words is "seven billion, five hundred twenty-one million, seven hundred fifty-nine thousand, seven hundred twenty-five".