2065440220651 has 4 divisors (see below), whose sum is σ = 2065487428152. Its totient is φ = 2065393013152.

The previous prime is 2065440220637. The next prime is 2065440220661. The reversal of 2065440220651 is 1560220445602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2065440220651 - 2⁵ = 2065440220619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2065440220651.

It is not an unprimeable number, because it can be changed into a prime (2065440220661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23538061 + ... + 23625646.

It is an arithmetic number, because the mean of its divisors is an integer number (516371857038).

Almost surely, 2^{2065440220651} is an apocalyptic number.

2065440220651 is a deficient number, since it is larger than the sum of its proper divisors (47207501).

2065440220651 is an equidigital number, since it uses as much as digits as its factorization.

2065440220651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47207500.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 2065440220651 in words is "two trillion, sixty-five billion, four hundred forty million, two hundred twenty thousand, six hundred fifty-one".