6981132138 has 8 divisors (see below), whose sum is σ = 13962264288. Its totient is φ = 2327044044.

The previous prime is 6981132121. The next prime is 6981132149. The reversal of 6981132138 is 8312311896.

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

6981132138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 6981132138.

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, 581761006 + ... + 581761017.

It is an arithmetic number, because the mean of its divisors is an integer number (1745283036).

Almost surely, 2^6981132138 is an apocalyptic number.

6981132138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6981132138 is a wasteful number, since it uses less digits than its factorization.

6981132138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163522028.

The product of its digits is 62208, while the sum is 42.

The square root of 6981132138 is about 83553.1695269545. The cubic root of 6981132138 is about 1911.2109256956.

The spelling of 6981132138 in words is "six billion, nine hundred eighty-one million, one hundred thirty-two thousand, one hundred thirty-eight".