2645065872 has 120 divisors (see below), whose sum is σ = 7991006400. Its totient is φ = 814243584.

The previous prime is 2645065847. The next prime is 2645065897. The reversal of 2645065872 is 2785605462.

2645065872 is a `hidden beast` number, since 2 + 64 + 5 + 0 + 6 + 587 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (2645065847) and next prime (2645065897).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82279 + ... + 109817.

It is an arithmetic number, because the mean of its divisors is an integer number (66591720).

Almost surely, 2^2645065872 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 2645065872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3995503200).

2645065872 is an abundant number, since it is smaller than the sum of its proper divisors (5345940528).

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

2645065872 is a wasteful number, since it uses less digits than its factorization.

2645065872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27605 (or 27596 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 2645065872 is about 51430.2038883767. The cubic root of 2645065872 is about 1382.9681043772.

The spelling of 2645065872 in words is "two billion, six hundred forty-five million, sixty-five thousand, eight hundred seventy-two".