165444027107 has 4 divisors (see below), whose sum is σ = 165697387680. Its totient is φ = 165190666536.

The previous prime is 165444027103. The next prime is 165444027109. The reversal of 165444027107 is 701720444561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165444027107 - 2² = 165444027103 is a prime.

It is a super-2 number, since 2×165444027107² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165444027103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126679307 + ... + 126680612.

It is an arithmetic number, because the mean of its divisors is an integer number (41424346920).

Almost surely, 2^165444027107 is an apocalyptic number.

165444027107 is a deficient number, since it is larger than the sum of its proper divisors (253360573).

165444027107 is an equidigital number, since it uses as much as digits as its factorization.

165444027107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253360572.

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 165444027107 in words is "one hundred sixty-five billion, four hundred forty-four million, twenty-seven thousand, one hundred seven".