6525260782681 has 3 divisors (see below), whose sum is σ = 6525263337141. Its totient is φ = 6525258228222.

The previous prime is 6525260782679. The next prime is 6525260782693. The reversal of 6525260782681 is 1862870625256.

The square root of 6525260782681 is 2554459.

It is a perfect power (a square), and thus also a powerful number.

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 is not a de Polignac number, because 6525260782681 - 2¹ = 6525260782679 is a prime.

It is a super-3 number, since 3×6525260782681³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6525560782681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1277230 + ... + 3831688.

It is an arithmetic number, because the mean of its divisors is an integer number (2175087779047).

Almost surely, 2^{6525260782681} is an apocalyptic number.

6525260782681 is the 2554459-th square number.

6525260782681 is the 1277230-th centered octagonal number.

It is an amenable number.

6525260782681 is a deficient number, since it is larger than the sum of its proper divisors (2554460).

6525260782681 is an frugal number, since it uses more digits than its factorization.

6525260782681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108918 (or 2554459 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 6525260782681 in words is "six trillion, five hundred twenty-five billion, two hundred sixty million, seven hundred eighty-two thousand, six hundred eighty-one".