165511210163 has 16 divisors (see below), whose sum is σ = 188763553440. Its totient is φ = 143765239296.

The previous prime is 165511210063. The next prime is 165511210169. The reversal of 165511210163 is 361012115561.

It is a cyclic number.

It is not a de Polignac number, because 165511210163 - 2¹⁴ = 165511193779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165511210169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1142048 + ... + 1278786.

It is an arithmetic number, because the mean of its divisors is an integer number (11797722090).

Almost surely, 2^165511210163 is an apocalyptic number.

165511210163 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165511210163 is a deficient number, since it is larger than the sum of its proper divisors (23252343277).

165511210163 is a wasteful number, since it uses less digits than its factorization.

165511210163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142246.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 165511210163 in words is "one hundred sixty-five billion, five hundred eleven million, two hundred ten thousand, one hundred sixty-three".