165605461411 has 8 divisors (see below), whose sum is σ = 178347882384. Its totient is φ = 152863546080.

The previous prime is 165605461387. The next prime is 165605461421. The reversal of 165605461411 is 114164506561.

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 165605461411 - 2¹³ = 165605453219 is a prime.

It is a super-2 number, since 2×165605461411² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165605461421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811725 + ... + 995041.

It is an arithmetic number, because the mean of its divisors is an integer number (22293485298).

Almost surely, 2^165605461411 is an apocalyptic number.

165605461411 is a deficient number, since it is larger than the sum of its proper divisors (12742420973).

165605461411 is a wasteful number, since it uses less digits than its factorization.

165605461411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252821.

The product of its (nonzero) digits is 86400, while the sum is 40.

Adding to 165605461411 its reverse (114164506561), we get a palindrome (279769967972).

The spelling of 165605461411 in words is "one hundred sixty-five billion, six hundred five million, four hundred sixty-one thousand, four hundred eleven".