6642636242 has 64 divisors (see below), whose sum is σ = 11341983744. Its totient is φ = 2891773440.

The previous prime is 6642636229. The next prime is 6642636269. The reversal of 6642636242 is 2426362466.

It is a self number, because there is not a number n which added to its sum of digits gives 6642636242.

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 31 ways as a sum of consecutive naturals, for example, 10330373 + ... + 10331015.

It is an arithmetic number, because the mean of its divisors is an integer number (177218496).

Almost surely, 2^6642636242 is an apocalyptic number.

6642636242 is a deficient number, since it is larger than the sum of its proper divisors (4699347502).

6642636242 is a wasteful number, since it uses less digits than its factorization.

6642636242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903.

The product of its digits is 497664, while the sum is 41.

The square root of 6642636242 is about 81502.3695483757. The cubic root of 6642636242 is about 1879.8079857084.

The spelling of 6642636242 in words is "six billion, six hundred forty-two million, six hundred thirty-six thousand, two hundred forty-two".