3265645656 has 128 divisors (see below), whose sum is σ = 10186283520. Its totient is φ = 849429504.

The previous prime is 3265645631. The next prime is 3265645657. The reversal of 3265645656 is 6565465623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3265645657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149191 + ... + 169673.

It is an arithmetic number, because the mean of its divisors is an integer number (79580340).

Almost surely, 2^3265645656 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 3265645656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5093141760).

3265645656 is an abundant number, since it is smaller than the sum of its proper divisors (6920637864).

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

3265645656 is a wasteful number, since it uses less digits than its factorization.

3265645656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20585 (or 20581 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 48.

The square root of 3265645656 is about 57145.8279842020. The cubic root of 3265645656 is about 1483.6211631944.

The spelling of 3265645656 in words is "three billion, two hundred sixty-five million, six hundred forty-five thousand, six hundred fifty-six".