165145623101 has 4 divisors (see below), whose sum is σ = 165191589852. Its totient is φ = 165099656352.

The previous prime is 165145623059. The next prime is 165145623113. The reversal of 165145623101 is 101326541561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46537707076 + 118607916025 = 215726^2 + 344395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165145623101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165145623001) 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, 22977986 + ... + 22985171.

It is an arithmetic number, because the mean of its divisors is an integer number (41297897463).

Almost surely, 2^165145623101 is an apocalyptic number.

It is an amenable number.

165145623101 is a deficient number, since it is larger than the sum of its proper divisors (45966751).

165145623101 is an equidigital number, since it uses as much as digits as its factorization.

165145623101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45966750.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 165145623101 in words is "one hundred sixty-five billion, one hundred forty-five million, six hundred twenty-three thousand, one hundred one".