165072225533 has 4 divisors (see below), whose sum is σ = 167397186528. Its totient is φ = 162747264540.

The previous prime is 165072225497. The next prime is 165072225541. The reversal of 165072225533 is 335522270561.

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 165072225533 - 2¹⁸ = 165071963389 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 (165072225583) 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, 1162480391 + ... + 1162480532.

It is an arithmetic number, because the mean of its divisors is an integer number (41849296632).

Almost surely, 2^165072225533 is an apocalyptic number.

It is an amenable number.

165072225533 is a deficient number, since it is larger than the sum of its proper divisors (2324960995).

165072225533 is an equidigital number, since it uses as much as digits as its factorization.

165072225533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324960994.

The product of its (nonzero) digits is 378000, while the sum is 41.

The spelling of 165072225533 in words is "one hundred sixty-five billion, seventy-two million, two hundred twenty-five thousand, five hundred thirty-three".