5171681861 has 8 divisors (see below), whose sum is σ = 5243789184. Its totient is φ = 5099608800.

The previous prime is 5171681831. The next prime is 5171681863. The reversal of 5171681861 is 1681861715.

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 5171681861 - 2¹⁸ = 5171419717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5171681863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517070 + ... + 526976.

It is an arithmetic number, because the mean of its divisors is an integer number (655473648).

Almost surely, 2^5171681861 is an apocalyptic number.

It is an amenable number.

5171681861 is a deficient number, since it is larger than the sum of its proper divisors (72107323).

5171681861 is an equidigital number, since it uses as much as digits as its factorization.

5171681861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17131.

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

The square root of 5171681861 is about 71914.4064913283. The cubic root of 5171681861 is about 1729.3275768910.

The spelling of 5171681861 in words is "five billion, one hundred seventy-one million, six hundred eighty-one thousand, eight hundred sixty-one".