10581668232581 has 8 divisors (see below), whose sum is σ = 10870276245144. Its totient is φ = 10293197955840.

The previous prime is 10581668232559. The next prime is 10581668232587. The reversal of 10581668232581 is 18523286618501.

It can be written as a sum of positive squares in 4 ways, for example, as 3217180322500 + 7364487910081 = 1793650^2 + 2713759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10581668232581 is a prime.

It is a super-2 number, since 2×10581668232581² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10581668232587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34278200 + ... + 34585521.

It is an arithmetic number, because the mean of its divisors is an integer number (1358784530643).

Almost surely, 2^{10581668232581} is an apocalyptic number.

It is an amenable number.

10581668232581 is a deficient number, since it is larger than the sum of its proper divisors (288608012563).

10581668232581 is an equidigital number, since it uses as much as digits as its factorization.

10581668232581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68867911.

The product of its (nonzero) digits is 5529600, while the sum is 56.

The spelling of 10581668232581 in words is "ten trillion, five hundred eighty-one billion, six hundred sixty-eight million, two hundred thirty-two thousand, five hundred eighty-one".