2645889792 has 432 divisors, whose sum is σ = 9277078272. Its totient is φ = 651755520.

The previous prime is 2645889781. The next prime is 2645889793. The reversal of 2645889792 is 2979885462.

It is not an unprimeable number, because it can be changed into a prime (2645889793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20197567 + ... + 20197697.

Almost surely, 2^2645889792 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 2645889792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4638539136).

2645889792 is an abundant number, since it is smaller than the sum of its proper divisors (6631188480).

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

2645889792 is a wasteful number, since it uses less digits than its factorization.

2645889792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 173 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The square root of 2645889792 is about 51438.2133437778. The cubic root of 2645889792 is about 1383.1116845179. Note that the first 3 decimals are identical.

The spelling of 2645889792 in words is "two billion, six hundred forty-five million, eight hundred eighty-nine thousand, seven hundred ninety-two".