6921240264 has 64 divisors (see below), whose sum is σ = 19237488000. Its totient is φ = 2305661760.

The previous prime is 6921240259. The next prime is 6921240283. The reversal of 6921240264 is 4620421296.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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, 377469 + ... + 395379.

It is an arithmetic number, because the mean of its divisors is an integer number (300585750).

Almost surely, 2^6921240264 is an apocalyptic number.

It is an amenable number.

6921240264 is an abundant number, since it is smaller than the sum of its proper divisors (12316247736).

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

6921240264 is a wasteful number, since it uses less digits than its factorization.

6921240264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19715 (or 19705 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 6921240264 is about 83193.9917542126. The cubic root of 6921240264 is about 1905.7297272558.

The spelling of 6921240264 in words is "six billion, nine hundred twenty-one million, two hundred forty thousand, two hundred sixty-four".