2065639560 has 128 divisors (see below), whose sum is σ = 6338217600. Its totient is φ = 538388480.

The previous prime is 2065639529. The next prime is 2065639627. The reversal of 2065639560 is 659365602.

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, 1394020 + ... + 1395500.

It is an arithmetic number, because the mean of its divisors is an integer number (49517325).

Almost surely, 2^2065639560 is an apocalyptic number.

2065639560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2065639560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3169108800).

2065639560 is an abundant number, since it is smaller than the sum of its proper divisors (4272578040).

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

2065639560 is a wasteful number, since it uses less digits than its factorization.

2065639560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751 (or 1747 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 42.

The square root of 2065639560 is about 45449.3075854847. The cubic root of 2065639560 is about 1273.5563945603.

The spelling of 2065639560 in words is "two billion, sixty-five million, six hundred thirty-nine thousand, five hundred sixty".