6448625525 has 6 divisors (see below), whose sum is σ = 7996295682. Its totient is φ = 5158900400.

The previous prime is 6448625507. The next prime is 6448625543. The reversal of 6448625525 is 5255268446.

6448625525 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6448625507) and next prime (6448625543).

It can be written as a sum of positive squares in 3 ways, for example, as 221206129 + 6227419396 = 14873^2 + 78914^2 .

It is not a de Polignac number, because 6448625525 - 2⁶ = 6448625461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6448625525.

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 5 ways as a sum of consecutive naturals, for example, 128972486 + ... + 128972535.

It is an arithmetic number, because the mean of its divisors is an integer number (1332715947).

Almost surely, 2^6448625525 is an apocalyptic number.

It is an amenable number.

6448625525 is a deficient number, since it is larger than the sum of its proper divisors (1547670157).

6448625525 is a wasteful number, since it uses less digits than its factorization.

6448625525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257945031 (or 257945026 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 47.

The square root of 6448625525 is about 80303.3344575429. The cubic root of 6448625525 is about 1861.3257520290.

The spelling of 6448625525 in words is "six billion, four hundred forty-eight million, six hundred twenty-five thousand, five hundred twenty-five".