160517821405 has 4 divisors (see below), whose sum is σ = 192621385692. Its totient is φ = 128414257120.

The previous prime is 160517821363. The next prime is 160517821421. The reversal of 160517821405 is 504128715061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504128715061 = 4409 ⋅114340829.

It can be written as a sum of positive squares in 2 ways, for example, as 98881318116 + 61636503289 = 314454^2 + 248267^2 .

It is a de Polignac number, because none of the positive numbers 2^k-160517821405 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16051782136 + ... + 16051782145.

It is an arithmetic number, because the mean of its divisors is an integer number (48155346423).

Almost surely, 2^160517821405 is an apocalyptic number.

It is an amenable number.

160517821405 is a deficient number, since it is larger than the sum of its proper divisors (32103564287).

160517821405 is an equidigital number, since it uses as much as digits as its factorization.

160517821405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32103564286.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 160517821405 in words is "one hundred sixty billion, five hundred seventeen million, eight hundred twenty-one thousand, four hundred five".