165075228691 has 16 divisors (see below), whose sum is σ = 169724636928. Its totient is φ = 160497517600.

The previous prime is 165075228671. The next prime is 165075228697. The reversal of 165075228691 is 196822570561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 165075228691 - 2²¹ = 165073131539 is a prime.

It is a super-2 number, since 2×165075228691² (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 (165075228697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3257256 + ... + 3307546.

It is an arithmetic number, because the mean of its divisors is an integer number (10607789808).

Almost surely, 2^165075228691 is an apocalyptic number.

165075228691 is a deficient number, since it is larger than the sum of its proper divisors (4649408237).

165075228691 is an equidigital number, since it uses as much as digits as its factorization.

165075228691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51002.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 165075228691 in words is "one hundred sixty-five billion, seventy-five million, two hundred twenty-eight thousand, six hundred ninety-one".