2165656026 has 32 divisors (see below), whose sum is σ = 4500840960. Its totient is φ = 693854784.

The previous prime is 2165656019. The next prime is 2165656037. The reversal of 2165656026 is 6206565612.

It is a happy number.

It is a super-2 number, since 2×2165656026² = 9380132045900225352, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10896 + ... + 66708.

It is an arithmetic number, because the mean of its divisors is an integer number (140651280).

Almost surely, 2^2165656026 is an apocalyptic number.

2165656026 is an abundant number, since it is smaller than the sum of its proper divisors (2335184934).

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

2165656026 is a wasteful number, since it uses less digits than its factorization.

2165656026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56070.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 2165656026 is about 46536.6095241155. The cubic root of 2165656026 is about 1293.7881212413.

The spelling of 2165656026 in words is "two billion, one hundred sixty-five million, six hundred fifty-six thousand, twenty-six".