6525885257 has 4 divisors (see below), whose sum is σ = 6526046916. Its totient is φ = 6525723600.

The previous prime is 6525885241. The next prime is 6525885259. The reversal of 6525885257 is 7525885256.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6218268736 + 307616521 = 78856^2 + 17539^2 .

It is a cyclic number.

It is not a de Polignac number, because 6525885257 - 2⁴ = 6525885241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6525885199 and 6525885208.

It is not an unprimeable number, because it can be changed into a prime (6525885259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36323 + ... + 119879.

It is an arithmetic number, because the mean of its divisors is an integer number (1631511729).

Almost surely, 2^6525885257 is an apocalyptic number.

It is an amenable number.

6525885257 is a deficient number, since it is larger than the sum of its proper divisors (161659).

6525885257 is an equidigital number, since it uses as much as digits as its factorization.

6525885257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161658.

The product of its digits is 6720000, while the sum is 53.

The square root of 6525885257 is about 80782.9515244399. The cubic root of 6525885257 is about 1868.7296563417.

Subtracting 6525885257 from its reverse (7525885256), we obtain a palindrome (999999999).

The spelling of 6525885257 in words is "six billion, five hundred twenty-five million, eight hundred eighty-five thousand, two hundred fifty-seven".