165280012127 has 4 divisors (see below), whose sum is σ = 170979322920. Its totient is φ = 159580701336.

The previous prime is 165280012099. The next prime is 165280012129. The reversal of 165280012127 is 721210082561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165280012127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165280012129) 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, 2849655353 + ... + 2849655410.

It is an arithmetic number, because the mean of its divisors is an integer number (42744830730).

Almost surely, 2^165280012127 is an apocalyptic number.

165280012127 is a deficient number, since it is larger than the sum of its proper divisors (5699310793).

165280012127 is an equidigital number, since it uses as much as digits as its factorization.

165280012127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5699310792.

The product of its (nonzero) digits is 13440, while the sum is 35.

Adding to 165280012127 its reverse (721210082561), we get a palindrome (886490094688).

The spelling of 165280012127 in words is "one hundred sixty-five billion, two hundred eighty million, twelve thousand, one hundred twenty-seven".