6636375648 has 144 divisors (see below), whose sum is σ = 22151394720. Its totient is φ = 1844840448.

The previous prime is 6636375617. The next prime is 6636375673. The reversal of 6636375648 is 8465736366.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 6636375594 and 6636375603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30108 + ... + 119076.

It is an arithmetic number, because the mean of its divisors is an integer number (153829130).

Almost surely, 2^6636375648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6636375648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11075697360).

6636375648 is an abundant number, since it is smaller than the sum of its proper divisors (15515019072).

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

6636375648 is a wasteful number, since it uses less digits than its factorization.

6636375648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89029 (or 89018 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The square root of 6636375648 is about 81463.9530590064. The cubic root of 6636375648 is about 1879.2172356212.

The spelling of 6636375648 in words is "six billion, six hundred thirty-six million, three hundred seventy-five thousand, six hundred forty-eight".