165327842257 has 4 divisors (see below), whose sum is σ = 169796162356. Its totient is φ = 160859522160.

The previous prime is 165327842189. The next prime is 165327842261. The reversal of 165327842257 is 752248723561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103828306176 + 61499536081 = 322224^2 + 247991^2 .

It is a cyclic number.

It is not a de Polignac number, because 165327842257 - 2⁷ = 165327842129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165327840257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2234159994 + ... + 2234160067.

It is an arithmetic number, because the mean of its divisors is an integer number (42449040589).

Almost surely, 2^165327842257 is an apocalyptic number.

It is an amenable number.

165327842257 is a deficient number, since it is larger than the sum of its proper divisors (4468320099).

165327842257 is an equidigital number, since it uses as much as digits as its factorization.

165327842257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4468320098.

The product of its digits is 5644800, while the sum is 52.

The spelling of 165327842257 in words is "one hundred sixty-five billion, three hundred twenty-seven million, eight hundred forty-two thousand, two hundred fifty-seven".