5681551749 has 8 divisors (see below), whose sum is σ = 7576493760. Its totient is φ = 3787155456.

The previous prime is 5681551739. The next prime is 5681551751. The reversal of 5681551749 is 9471551865.

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

It is not a de Polignac number, because 5681551749 - 2⁷ = 5681551621 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681551739) 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, 111484 + ... + 154245.

It is an arithmetic number, because the mean of its divisors is an integer number (947061720).

Almost surely, 2^5681551749 is an apocalyptic number.

It is an amenable number.

5681551749 is a deficient number, since it is larger than the sum of its proper divisors (1894942011).

5681551749 is a wasteful number, since it uses less digits than its factorization.

5681551749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272859.

The product of its digits is 1512000, while the sum is 51.

The square root of 5681551749 is about 75376.0688083426. The cubic root of 5681551749 is about 1784.3867466279.

The spelling of 5681551749 in words is "five billion, six hundred eighty-one million, five hundred fifty-one thousand, seven hundred forty-nine".