165210040633111 has 4 divisors (see below), whose sum is σ = 168725147880672. Its totient is φ = 161694933385552.

The previous prime is 165210040633109. The next prime is 165210040633153. The reversal of 165210040633111 is 111336040012561.

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 165210040633111 - 2¹ = 165210040633109 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 (165210040633811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757553623710 + ... + 1757553623803.

It is an arithmetic number, because the mean of its divisors is an integer number (42181286970168).

Almost surely, 2^{165210040633111} is an apocalyptic number.

165210040633111 is a deficient number, since it is larger than the sum of its proper divisors (3515107247561).

165210040633111 is an equidigital number, since it uses as much as digits as its factorization.

165210040633111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515107247560.

The product of its (nonzero) digits is 12960, while the sum is 34.

Adding to 165210040633111 its reverse (111336040012561), we get a palindrome (276546080645672).

The spelling of 165210040633111 in words is "one hundred sixty-five trillion, two hundred ten billion, forty million, six hundred thirty-three thousand, one hundred eleven".