6921536144 has 20 divisors (see below), whose sum is σ = 14116291440. Its totient is φ = 3278622240.

The previous prime is 6921536143. The next prime is 6921536159. The reversal of 6921536144 is 4416351296.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6921536143) 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, 11383802 + ... + 11384409.

It is an arithmetic number, because the mean of its divisors is an integer number (705814572).

Almost surely, 2^6921536144 is an apocalyptic number.

It is an amenable number.

6921536144 is an abundant number, since it is smaller than the sum of its proper divisors (7194755296).

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

6921536144 is a wasteful number, since it uses less digits than its factorization.

6921536144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22768238 (or 22768232 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 6921536144 is about 83195.7699886238. The cubic root of 6921536144 is about 1905.7568832401.

The spelling of 6921536144 in words is "six billion, nine hundred twenty-one million, five hundred thirty-six thousand, one hundred forty-four".