6638325144 has 32 divisors (see below), whose sum is σ = 18104523840. Its totient is φ = 2011613600.

The previous prime is 6638325119. The next prime is 6638325157. The reversal of 6638325144 is 4415238366.

It is a junction number, because it is equal to n+sod(n) for n = 6638325096 and 6638325105.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12572322 + ... + 12572849.

It is an arithmetic number, because the mean of its divisors is an integer number (565766370).

Almost surely, 2^6638325144 is an apocalyptic number.

It is an amenable number.

6638325144 is an abundant number, since it is smaller than the sum of its proper divisors (11466198696).

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

6638325144 is a wasteful number, since it uses less digits than its factorization.

6638325144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25145191 (or 25145187 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 6638325144 is about 81475.9175707767. The cubic root of 6638325144 is about 1879.4012300184.

The spelling of 6638325144 in words is "six billion, six hundred thirty-eight million, three hundred twenty-five thousand, one hundred forty-four".