6921123606 has 48 divisors (see below), whose sum is σ = 15984540000. Its totient is φ = 2156745984.

The previous prime is 6921123593. The next prime is 6921123611. The reversal of 6921123606 is 6063211296.

It is a happy number.

6921123606 is a `hidden beast` number, since 6 + 9 + 21 + 1 + 23 + 606 = 666.

It is a congruent number.

It is an unprimeable number.

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, 30306 + ... + 121493.

It is an arithmetic number, because the mean of its divisors is an integer number (333011250).

Almost surely, 2^6921123606 is an apocalyptic number.

6921123606 is an abundant number, since it is smaller than the sum of its proper divisors (9063416394).

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

6921123606 is a wasteful number, since it uses less digits than its factorization.

6921123606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151973 (or 151970 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 6921123606 is about 83193.2906309157. The cubic root of 6921123606 is about 1905.7190201253.

The spelling of 6921123606 in words is "six billion, nine hundred twenty-one million, one hundred twenty-three thousand, six hundred six".