5386158661581 has 6 divisors (see below), whose sum is σ = 7780006955630. Its totient is φ = 3590772441048.

The previous prime is 5386158661567. The next prime is 5386158661591. The reversal of 5386158661581 is 1851668516835.

5386158661581 is a `hidden beast` number, since 5 + 3 + 8 + 6 + 1 + 5 + 8 + 6 + 615 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3054228093225 + 2331930568356 = 1747635^2 + 1527066^2 .

It is not a de Polignac number, because 5386158661581 - 2¹¹ = 5386158659533 is a prime.

It is a super-3 number, since 3×5386158661581³ (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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5386158661591) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 299231036746 + ... + 299231036763.

Almost surely, 2^{5386158661581} is an apocalyptic number.

It is an amenable number.

5386158661581 is a deficient number, since it is larger than the sum of its proper divisors (2393848294049).

5386158661581 is a wasteful number, since it uses less digits than its factorization.

5386158661581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598462073515 (or 598462073512 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 63.

The spelling of 5386158661581 in words is "five trillion, three hundred eighty-six billion, one hundred fifty-eight million, six hundred sixty-one thousand, five hundred eighty-one".