6645242044 has 12 divisors (see below), whose sum is σ = 13290484144. Its totient is φ = 2847960864.

The previous prime is 6645242017. The next prime is 6645242053. The reversal of 6645242044 is 4402425466.

6645242044 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6645241994 and 6645242012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118665009 + ... + 118665064.

Almost surely, 2^6645242044 is an apocalyptic number.

It is an amenable number.

6645242044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6645242044 is a wasteful number, since it uses less digits than its factorization.

6645242044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237330084 (or 237330082 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 37.

The square root of 6645242044 is about 81518.3540314695. The cubic root of 6645242044 is about 1880.0537599686.

The spelling of 6645242044 in words is "six billion, six hundred forty-five million, two hundred forty-two thousand, forty-four".