6642538804 has 48 divisors (see below), whose sum is σ = 12959331840. Its totient is φ = 2953830240.

The previous prime is 6642538801. The next prime is 6642538829. The reversal of 6642538804 is 4088352466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642538801) 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, 367327 + ... + 384985.

It is an arithmetic number, because the mean of its divisors is an integer number (269986080).

Almost surely, 2^6642538804 is an apocalyptic number.

It is an amenable number.

6642538804 is a deficient number, since it is larger than the sum of its proper divisors (6316793036).

6642538804 is a wasteful number, since it uses less digits than its factorization.

6642538804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17860 (or 17858 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 46.

The square root of 6642538804 is about 81501.7717844220. The cubic root of 6642538804 is about 1879.7987942961.

The spelling of 6642538804 in words is "six billion, six hundred forty-two million, five hundred thirty-eight thousand, eight hundred four".