165440646011 has 2 divisors, whose sum is σ = 165440646012. Its totient is φ = 165440646010.

The previous prime is 165440645977. The next prime is 165440646097. The reversal of 165440646011 is 110646044561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165440646011 - 2⁶ = 165440645947 is a prime.

It is not a weakly prime, because it can be changed into another prime (165440646311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82720323005 + 82720323006.

It is an arithmetic number, because the mean of its divisors is an integer number (82720323006).

Almost surely, 2^165440646011 is an apocalyptic number.

165440646011 is a deficient number, since it is larger than the sum of its proper divisors (1).

165440646011 is an equidigital number, since it uses as much as digits as its factorization.

165440646011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 165440646011 in words is "one hundred sixty-five billion, four hundred forty million, six hundred forty-six thousand, eleven".