165105210701 has 4 divisors (see below), whose sum is σ = 165114933504. Its totient is φ = 165095487900.

The previous prime is 165105210661. The next prime is 165105210749. The reversal of 165105210701 is 107012501561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165105210701 - 2¹⁸ = 165104948557 is a prime.

It is a super-2 number, since 2×165105210701² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165105260701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4835885 + ... + 4869906.

It is an arithmetic number, because the mean of its divisors is an integer number (41278733376).

Almost surely, 2^165105210701 is an apocalyptic number.

It is an amenable number.

165105210701 is a deficient number, since it is larger than the sum of its proper divisors (9722803).

165105210701 is an equidigital number, since it uses as much as digits as its factorization.

165105210701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9722802.

The product of its (nonzero) digits is 2100, while the sum is 29.

The spelling of 165105210701 in words is "one hundred sixty-five billion, one hundred five million, two hundred ten thousand, seven hundred one".