5681271387 has 32 divisors (see below), whose sum is σ = 8349060096. Its totient is φ = 3407801600.

The previous prime is 5681271373. The next prime is 5681271403. The reversal of 5681271387 is 7831721865.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 5681271387 - 2¹⁰ = 5681270363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5681271317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1328062 + ... + 1332332.

It is an arithmetic number, because the mean of its divisors is an integer number (260908128).

Almost surely, 2^5681271387 is an apocalyptic number.

5681271387 is a deficient number, since it is larger than the sum of its proper divisors (2667788709).

5681271387 is a wasteful number, since it uses less digits than its factorization.

5681271387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691.

The product of its digits is 564480, while the sum is 48.

The square root of 5681271387 is about 75374.2090306757. The cubic root of 5681271387 is about 1784.3573953469.

The spelling of 5681271387 in words is "five billion, six hundred eighty-one million, two hundred seventy-one thousand, three hundred eighty-seven".