6881888205 has 24 divisors (see below), whose sum is σ = 11937739320. Its totient is φ = 3667530240.

The previous prime is 6881888203. The next prime is 6881888227. The reversal of 6881888205 is 5028881886.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4428370116 + 2453518089 = 66546^2 + 49533^2 .

It is not a de Polignac number, because 6881888205 - 2¹ = 6881888203 is a prime.

It is a super-2 number, since 2×6881888205² = 94720770532236244050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6881888203) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1561 + ... + 117329.

It is an arithmetic number, because the mean of its divisors is an integer number (497405805).

Almost surely, 2^6881888205 is an apocalyptic number.

It is an amenable number.

6881888205 is a deficient number, since it is larger than the sum of its proper divisors (5055851115).

6881888205 is a wasteful number, since it uses less digits than its factorization.

6881888205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117101 (or 117098 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 54.

The square root of 6881888205 is about 82957.1467988141. The cubic root of 6881888205 is about 1902.1110612270. Note that the first 3 decimals are identical.

The spelling of 6881888205 in words is "six billion, eight hundred eighty-one million, eight hundred eighty-eight thousand, two hundred five".