6525521425 has 6 divisors (see below), whose sum is σ = 8091646598. Its totient is φ = 5220417120.

The previous prime is 6525521413. The next prime is 6525521441. The reversal of 6525521425 is 5241255256.

It can be written as a sum of positive squares in 3 ways, for example, as 2064884481 + 4460636944 = 45441^2 + 66788^2 .

It is not a de Polignac number, because 6525521425 - 2⁵ = 6525521393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130510404 + ... + 130510453.

Almost surely, 2^6525521425 is an apocalyptic number.

It is an amenable number.

6525521425 is a deficient number, since it is larger than the sum of its proper divisors (1566125173).

6525521425 is a wasteful number, since it uses less digits than its factorization.

6525521425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261020867 (or 261020862 counting only the distinct ones).

The product of its digits is 120000, while the sum is 37.

The square root of 6525521425 is about 80780.6995822641. The cubic root of 6525521425 is about 1868.6949271436.

The spelling of 6525521425 in words is "six billion, five hundred twenty-five million, five hundred twenty-one thousand, four hundred twenty-five".