165156125455 has 4 divisors (see below), whose sum is σ = 198187350552. Its totient is φ = 132124900360.

The previous prime is 165156125443. The next prime is 165156125473. The reversal of 165156125455 is 554521651561.

165156125455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554521651561 = 1613 ⋅343782797.

It is not a de Polignac number, because 165156125455 - 2⁷ = 165156125327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 16515612541 + ... + 16515612550.

It is an arithmetic number, because the mean of its divisors is an integer number (49546837638).

Almost surely, 2^165156125455 is an apocalyptic number.

165156125455 is a deficient number, since it is larger than the sum of its proper divisors (33031225097).

165156125455 is an equidigital number, since it uses as much as digits as its factorization.

165156125455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33031225096.

The product of its digits is 900000, while the sum is 46.

The spelling of 165156125455 in words is "one hundred sixty-five billion, one hundred fifty-six million, one hundred twenty-five thousand, four hundred fifty-five".