5181176681 has 8 divisors (see below), whose sum is σ = 5202289800. Its totient is φ = 5160107008.

The previous prime is 5181176641. The next prime is 5181176687. The reversal of 5181176681 is 1866711815.

It can be written as a sum of positive squares in 4 ways, for example, as 65351056 + 5115825625 = 8084^2 + 71525^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5181176681 - 2²⁶ = 5114067817 is a prime.

It is a super-2 number, since 2×5181176681² = 53689183599476351522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5181176687) 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, 239735 + ... + 260451.

It is an arithmetic number, because the mean of its divisors is an integer number (650286225).

Almost surely, 2^5181176681 is an apocalyptic number.

It is an amenable number.

5181176681 is a deficient number, since it is larger than the sum of its proper divisors (21113119).

5181176681 is a wasteful number, since it uses less digits than its factorization.

5181176681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21723.

The product of its digits is 80640, while the sum is 44.

The square root of 5181176681 is about 71980.3909478130. The cubic root of 5181176681 is about 1730.3852351359.

The spelling of 5181176681 in words is "five billion, one hundred eighty-one million, one hundred seventy-six thousand, six hundred eighty-one".