165180415779 has 16 divisors (see below), whose sum is σ = 252605655040. Its totient is φ = 106568009640.

The previous prime is 165180415747. The next prime is 165180415793. The reversal of 165180415779 is 977514081561.

165180415779 is a `hidden beast` number, since 1 + 6 + 518 + 0 + 4 + 1 + 57 + 79 = 666.

165180415779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165180415779 - 2⁵ = 165180415747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165180410779) 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 in 15 ways as a sum of consecutive naturals, for example, 98673247 + ... + 98674920.

It is an arithmetic number, because the mean of its divisors is an integer number (15787853440).

Almost surely, 2^165180415779 is an apocalyptic number.

165180415779 is a deficient number, since it is larger than the sum of its proper divisors (87425239261).

165180415779 is a wasteful number, since it uses less digits than its factorization.

165180415779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197348207 (or 197348201 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 54.

The spelling of 165180415779 in words is "one hundred sixty-five billion, one hundred eighty million, four hundred fifteen thousand, seven hundred seventy-nine".