165655417233 has 4 divisors (see below), whose sum is σ = 220873889648. Its totient is φ = 110436944820.

The previous prime is 165655417231. The next prime is 165655417237. The reversal of 165655417233 is 332714556561.

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 not a de Polignac number, because 165655417233 - 2¹ = 165655417231 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165655417231) 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, 27609236203 + ... + 27609236208.

It is an arithmetic number, because the mean of its divisors is an integer number (55218472412).

Almost surely, 2^165655417233 is an apocalyptic number.

It is an amenable number.

165655417233 is a deficient number, since it is larger than the sum of its proper divisors (55218472415).

165655417233 is an equidigital number, since it uses as much as digits as its factorization.

165655417233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55218472414.

The product of its digits is 2268000, while the sum is 48.

The spelling of 165655417233 in words is "one hundred sixty-five billion, six hundred fifty-five million, four hundred seventeen thousand, two hundred thirty-three".