5871867781 has 4 divisors (see below), whose sum is σ = 6323549932. Its totient is φ = 5420185632.

The previous prime is 5871867761. The next prime is 5871867811. The reversal of 5871867781 is 1877681785.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3146088100 + 2725779681 = 56090^2 + 52209^2 .

It is a cyclic number.

It is not a de Polignac number, because 5871867781 - 2¹¹ = 5871865733 is a prime.

It is a super-2 number, since 2×5871867781² = 68957662475091727922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5871867761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225841056 + ... + 225841081.

It is an arithmetic number, because the mean of its divisors is an integer number (1580887483).

Almost surely, 2^5871867781 is an apocalyptic number.

It is an amenable number.

5871867781 is a deficient number, since it is larger than the sum of its proper divisors (451682151).

5871867781 is a wasteful number, since it uses less digits than its factorization.

5871867781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451682150.

The product of its digits is 5268480, while the sum is 58.

The square root of 5871867781 is about 76628.1135158631. The cubic root of 5871867781 is about 1804.0923126075.

The spelling of 5871867781 in words is "five billion, eight hundred seventy-one million, eight hundred sixty-seven thousand, seven hundred eighty-one".