6881378642 has 8 divisors (see below), whose sum is σ = 10329897600. Its totient is φ = 3438079444.

The previous prime is 6881378641. The next prime is 6881378687. The reversal of 6881378642 is 2468731886.

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

It is not an unprimeable number, because it can be changed into a prime (6881378641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1301642 + ... + 1306917.

It is an arithmetic number, because the mean of its divisors is an integer number (1291237200).

Almost surely, 2^6881378642 is an apocalyptic number.

6881378642 is a deficient number, since it is larger than the sum of its proper divisors (3448518958).

6881378642 is a wasteful number, since it uses less digits than its factorization.

6881378642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609880.

The product of its digits is 3096576, while the sum is 53.

The square root of 6881378642 is about 82954.0754996402. The cubic root of 6881378642 is about 1902.0641133879.

The spelling of 6881378642 in words is "six billion, eight hundred eighty-one million, three hundred seventy-eight thousand, six hundred forty-two".