2805745656 has 128 divisors (see below), whose sum is σ = 8554636800. Its totient is φ = 748984320.

The previous prime is 2805745619. The next prime is 2805745673. The reversal of 2805745656 is 6565475082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226996 + ... + 239036.

It is an arithmetic number, because the mean of its divisors is an integer number (66833100).

Almost surely, 2^2805745656 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 2805745656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4277318400).

2805745656 is an abundant number, since it is smaller than the sum of its proper divisors (5748891144).

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

2805745656 is a wasteful number, since it uses less digits than its factorization.

2805745656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12149 (or 12145 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 48.

The square root of 2805745656 is about 52969.2897441527. The cubic root of 2805745656 is about 1410.4231675896.

The spelling of 2805745656 in words is "two billion, eight hundred five million, seven hundred forty-five thousand, six hundred fifty-six".