165363043533 has 4 divisors (see below), whose sum is σ = 220484058048. Its totient is φ = 110242029020.

The previous prime is 165363043523. The next prime is 165363043553. The reversal of 165363043533 is 335340363561.

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 a de Polignac number, because none of the positive numbers 2^k-165363043533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165363043523) 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, 27560507253 + ... + 27560507258.

It is an arithmetic number, because the mean of its divisors is an integer number (55121014512).

Almost surely, 2^165363043533 is an apocalyptic number.

It is an amenable number.

165363043533 is a deficient number, since it is larger than the sum of its proper divisors (55121014515).

165363043533 is an equidigital number, since it uses as much as digits as its factorization.

165363043533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55121014514.

The product of its (nonzero) digits is 874800, while the sum is 42.

The spelling of 165363043533 in words is "one hundred sixty-five billion, three hundred sixty-three million, forty-three thousand, five hundred thirty-three".