165400411 has 8 divisors (see below), whose sum is σ = 180615024. Its totient is φ = 150215520.

The previous prime is 165400381. The next prime is 165400447. The reversal of 165400411 is 114004561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165400411 - 2¹³ = 165392219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165400451) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5145 + ... + 18901.

It is an arithmetic number, because the mean of its divisors is an integer number (22576878).

Almost surely, 2^165400411 is an apocalyptic number.

165400411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165400411 is a deficient number, since it is larger than the sum of its proper divisors (15214613).

165400411 is a wasteful number, since it uses less digits than its factorization.

165400411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14861.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 165400411 is about 12860.8091114051. The cubic root of 165400411 is about 548.9239689313.

Adding to 165400411 its reverse (114004561), we get a palindrome (279404972).

The spelling of 165400411 in words is "one hundred sixty-five million, four hundred thousand, four hundred eleven".