6921696942 has 32 divisors (see below), whose sum is σ = 15467500800. Its totient is φ = 2294339544.

The previous prime is 6921696917. The next prime is 6921696949. The reversal of 6921696942 is 2496961296.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921696949) 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 15 ways as a sum of consecutive naturals, for example, 348378 + ... + 367709.

It is an arithmetic number, because the mean of its divisors is an integer number (483359400).

Almost surely, 2^6921696942 is an apocalyptic number.

6921696942 is an abundant number, since it is smaller than the sum of its proper divisors (8545803858).

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

6921696942 is a wasteful number, since it uses less digits than its factorization.

6921696942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716277 (or 716271 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 6921696942 is about 83196.7363662782. The cubic root of 6921696942 is about 1905.7716410201.

The spelling of 6921696942 in words is "six billion, nine hundred twenty-one million, six hundred ninety-six thousand, nine hundred forty-two".