5133261681 has 40 divisors (see below), whose sum is σ = 7730448000. Its totient is φ = 3394535040.

The previous prime is 5133261659. The next prime is 5133261701. The reversal of 5133261681 is 1861623315.

5133261681 is a `hidden beast` number, since 5 + 1 + 3 + 32 + 616 + 8 + 1 = 666.

It is not a de Polignac number, because 5133261681 - 2⁵ = 5133261649 is a prime.

It is a super-2 number, since 2×5133261681² = 52700750971245891522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5133261281) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8569420 + ... + 8570018.

It is an arithmetic number, because the mean of its divisors is an integer number (193261200).

Almost surely, 2^5133261681 is an apocalyptic number.

It is an amenable number.

5133261681 is a deficient number, since it is larger than the sum of its proper divisors (2597186319).

5133261681 is a wasteful number, since it uses less digits than its factorization.

5133261681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1282 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 5133261681 is about 71646.7841637013. The cubic root of 5133261681 is about 1725.0345641467.

Adding to 5133261681 its reverse (1861623315), we get a palindrome (6994884996).

The spelling of 5133261681 in words is "five billion, one hundred thirty-three million, two hundred sixty-one thousand, six hundred eighty-one".