2065709898 has 64 divisors (see below), whose sum is σ = 5281136640. Its totient is φ = 586278000.

The previous prime is 2065709881. The next prime is 2065709951. The reversal of 2065709898 is 8989075602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon 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, 38983 + ... + 75173.

It is an arithmetic number, because the mean of its divisors is an integer number (82517760).

Almost surely, 2^2065709898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2065709898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2640568320).

2065709898 is an abundant number, since it is smaller than the sum of its proper divisors (3215426742).

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

2065709898 is a wasteful number, since it uses less digits than its factorization.

2065709898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36360 (or 36354 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 2065709898 is about 45450.0813860657. The cubic root of 2065709898 is about 1273.5708498723.

The spelling of 2065709898 in words is "two billion, sixty-five million, seven hundred nine thousand, eight hundred ninety-eight".