6531261525 has 48 divisors (see below), whose sum is σ = 12006037120. Its totient is φ = 3481056000.

The previous prime is 6531261523. The next prime is 6531261557. The reversal of 6531261525 is 5251621356.

6531261525 is a `hidden beast` number, since 6 + 5 + 3 + 12 + 615 + 25 = 666.

It is not a de Polignac number, because 6531261525 - 2¹ = 6531261523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6531261525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531261523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1720029 + ... + 1723821.

Almost surely, 2^6531261525 is an apocalyptic number.

It is an amenable number.

6531261525 is a deficient number, since it is larger than the sum of its proper divisors (5474775595).

6531261525 is a wasteful number, since it uses less digits than its factorization.

6531261525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6363 (or 6352 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 6531261525 is about 80816.2206800095. The cubic root of 6531261525 is about 1869.2426919092.

The spelling of 6531261525 in words is "six billion, five hundred thirty-one million, two hundred sixty-one thousand, five hundred twenty-five".