165256450111 has 2 divisors, whose sum is σ = 165256450112. Its totient is φ = 165256450110.

The previous prime is 165256450109. The next prime is 165256450181. The reversal of 165256450111 is 111054652561.

165256450111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165256450111 - 2¹ = 165256450109 is a prime.

Together with 165256450109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165256450181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82628225055 + 82628225056.

It is an arithmetic number, because the mean of its divisors is an integer number (82628225056).

Almost surely, 2^165256450111 is an apocalyptic number.

165256450111 is a deficient number, since it is larger than the sum of its proper divisors (1).

165256450111 is an equidigital number, since it uses as much as digits as its factorization.

165256450111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 165256450111 in words is "one hundred sixty-five billion, two hundred fifty-six million, four hundred fifty thousand, one hundred eleven".