6645035628 has 216 divisors, whose sum is σ = 22005494784. Its totient is φ = 1670155200.

The previous prime is 6645035603. The next prime is 6645035641. The reversal of 6645035628 is 8265305466.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 596001 + ... + 607047.

Almost surely, 2^6645035628 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 6645035628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11002747392).

6645035628 is an abundant number, since it is smaller than the sum of its proper divisors (15360459156).

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

6645035628 is a wasteful number, since it uses less digits than its factorization.

6645035628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11113 (or 11101 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The square root of 6645035628 is about 81517.0879509321. The cubic root of 6645035628 is about 1880.0342935498.

The spelling of 6645035628 in words is "six billion, six hundred forty-five million, thirty-five thousand, six hundred twenty-eight".