6881988078 has 48 divisors (see below), whose sum is σ = 17056031616. Its totient is φ = 1964561040.

The previous prime is 6881988073. The next prime is 6881988133. The reversal of 6881988078 is 8708891886.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6881988073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124225 + ... + 170867.

It is an arithmetic number, because the mean of its divisors is an integer number (355333992).

Almost surely, 2^6881988078 is an apocalyptic number.

6881988078 is an abundant number, since it is smaller than the sum of its proper divisors (10174043538).

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

6881988078 is a wasteful number, since it uses less digits than its factorization.

6881988078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47829 (or 47826 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 63.

The square root of 6881988078 is about 82957.7487520003. The cubic root of 6881988078 is about 1902.1202626077.

The spelling of 6881988078 in words is "six billion, eight hundred eighty-one million, nine hundred eighty-eight thousand, seventy-eight".