6587995090681 has 3 divisors (see below), whose sum is σ = 6587997657391. Its totient is φ = 6587992523972.

The previous prime is 6587995090597. The next prime is 6587995090709. The reversal of 6587995090681 is 1860905997856.

The square root of 6587995090681 is 2566709.

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 can be written as a sum of positive squares in only one way, i.e., 862407538281 + 5725587552400 = 928659^2 + 2392820^2 .

It is not a de Polignac number, because 6587995090681 - 2⁹ = 6587995090169 is a prime.

It is a super-2 number, since 2×6587995090681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6587995040681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1283355 + ... + 3850063.

Almost surely, 2^{6587995090681} is an apocalyptic number.

6587995090681 is the 2566709-th square number.

6587995090681 is the 1283355-th centered octagonal number.

It is an amenable number.

6587995090681 is a deficient number, since it is larger than the sum of its proper divisors (2566710).

6587995090681 is an frugal number, since it uses more digits than its factorization.

6587995090681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133418 (or 2566709 counting only the distinct ones).

The product of its (nonzero) digits is 293932800, while the sum is 73.

The spelling of 6587995090681 in words is "six trillion, five hundred eighty-seven billion, nine hundred ninety-five million, ninety thousand, six hundred eighty-one".