165841752505 has 24 divisors (see below), whose sum is σ = 235086719040. Its totient is φ = 111334317120.

The previous prime is 165841752493. The next prime is 165841752511. The reversal of 165841752505 is 505257148561.

165841752505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165841752505 - 2⁵ = 165841752473 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 8911725 + ... + 8930314.

It is an arithmetic number, because the mean of its divisors is an integer number (9795279960).

Almost surely, 2^165841752505 is an apocalyptic number.

It is an amenable number.

165841752505 is a deficient number, since it is larger than the sum of its proper divisors (69244966535).

165841752505 is a wasteful number, since it uses less digits than its factorization.

165841752505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17842081 (or 17842068 counting only the distinct ones).

The product of its (nonzero) digits is 1680000, while the sum is 49.

The spelling of 165841752505 in words is "one hundred sixty-five billion, eight hundred forty-one million, seven hundred fifty-two thousand, five hundred five".