5681821138 has 8 divisors (see below), whose sum is σ = 9740264832. Its totient is φ = 2435066196.

The previous prime is 5681821111. The next prime is 5681821151. The reversal of 5681821138 is 8311281865.

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

It is a super-3 number, since 3×5681821138³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5681821094 and 5681821103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202922170 + ... + 202922197.

It is an arithmetic number, because the mean of its divisors is an integer number (1217533104).

Almost surely, 2^5681821138 is an apocalyptic number.

5681821138 is a deficient number, since it is larger than the sum of its proper divisors (4058443694).

5681821138 is a wasteful number, since it uses less digits than its factorization.

5681821138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405844376.

The product of its digits is 92160, while the sum is 43.

The square root of 5681821138 is about 75377.8557535302. The cubic root of 5681821138 is about 1784.4149482288.

The spelling of 5681821138 in words is "five billion, six hundred eighty-one million, eight hundred twenty-one thousand, one hundred thirty-eight".