6939891468 has 18 divisors (see below), whose sum is σ = 17542503524. Its totient is φ = 2313297144.

The previous prime is 6939891467. The next prime is 6939891509. The reversal of 6939891468 is 8641989396.

It is a happy number.

6939891468 is a `hidden beast` number, since 6 + 93 + 9 + 89 + 1 + 468 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (6939891467) 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 5 ways as a sum of consecutive naturals, for example, 96387346 + ... + 96387417.

Almost surely, 2^6939891468 is an apocalyptic number.

It is an amenable number.

6939891468 is an abundant number, since it is smaller than the sum of its proper divisors (10602612056).

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

6939891468 is a wasteful number, since it uses less digits than its factorization.

6939891468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192774773 (or 192774768 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The square root of 6939891468 is about 83306.0109956058. The cubic root of 6939891468 is about 1907.4400312093.

The spelling of 6939891468 in words is "six billion, nine hundred thirty-nine million, eight hundred ninety-one thousand, four hundred sixty-eight".