165112252404553 has 4 divisors (see below), whose sum is σ = 165293495273088. Its totient is φ = 164931009536020.

The previous prime is 165112252404511. The next prime is 165112252404641. The reversal of 165112252404553 is 355404252211561.

It is a happy number.

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 165112252404553 - 2³³ = 165103662469961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165112252404053) 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, 90621432901 + ... + 90621434722.

It is an arithmetic number, because the mean of its divisors is an integer number (41323373818272).

Almost surely, 2^{165112252404553} is an apocalyptic number.

It is an amenable number.

165112252404553 is a deficient number, since it is larger than the sum of its proper divisors (181242868535).

165112252404553 is an equidigital number, since it uses as much as digits as its factorization.

165112252404553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181242868534.

The product of its (nonzero) digits is 1440000, while the sum is 46.

The spelling of 165112252404553 in words is "one hundred sixty-five trillion, one hundred twelve billion, two hundred fifty-two million, four hundred four thousand, five hundred fifty-three".