165051820903 has 2 divisors, whose sum is σ = 165051820904. Its totient is φ = 165051820902.

The previous prime is 165051820861. The next prime is 165051820907. The reversal of 165051820903 is 309028150561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165051820903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165051820907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82525910451 + 82525910452.

It is an arithmetic number, because the mean of its divisors is an integer number (82525910452).

Almost surely, 2^165051820903 is an apocalyptic number.

165051820903 is a deficient number, since it is larger than the sum of its proper divisors (1).

165051820903 is an equidigital number, since it uses as much as digits as its factorization.

165051820903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 165051820903 in words is "one hundred sixty-five billion, fifty-one million, eight hundred twenty thousand, nine hundred three".