165554464121233 has 4 divisors (see below), whose sum is σ = 180604869950448. Its totient is φ = 150504058292020.

The previous prime is 165554464121197. The next prime is 165554464121237. The reversal of 165554464121233 is 332121464455561.

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 165554464121233 - 2³⁷ = 165417025167761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165554464121237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7525202914591 + ... + 7525202914612.

It is an arithmetic number, because the mean of its divisors is an integer number (45151217487612).

Almost surely, 2^{165554464121233} is an apocalyptic number.

It is an amenable number.

165554464121233 is a deficient number, since it is larger than the sum of its proper divisors (15050405829215).

165554464121233 is a wasteful number, since it uses less digits than its factorization.

165554464121233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15050405829214.

The product of its digits is 10368000, while the sum is 52.

The spelling of 165554464121233 in words is "one hundred sixty-five trillion, five hundred fifty-four billion, four hundred sixty-four million, one hundred twenty-one thousand, two hundred thirty-three".