6645045204 has 108 divisors (see below), whose sum is σ = 20392669024. Its totient is φ = 1786883328.

The previous prime is 6645045179. The next prime is 6645045223. The reversal of 6645045204 is 4025405466.

6645045204 is a `hidden beast` number, since 6 + 645 + 0 + 4 + 5 + 2 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27207 + ... + 118449.

Almost surely, 2^6645045204 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 6645045204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10196334512).

6645045204 is an abundant number, since it is smaller than the sum of its proper divisors (13747623820).

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

6645045204 is a wasteful number, since it uses less digits than its factorization.

6645045204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91294 (or 91272 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 6645045204 is about 81517.1466870621. The cubic root of 6645045204 is about 1880.0351966400.

The spelling of 6645045204 in words is "six billion, six hundred forty-five million, forty-five thousand, two hundred four".