16171520005 has 4 divisors (see below), whose sum is σ = 19405824012. Its totient is φ = 12937216000.

The previous prime is 16171519999. The next prime is 16171520017. The reversal of 16171520005 is 50002517161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50002517161 = 51481 ⋅971281.

It can be written as a sum of positive squares in 2 ways, for example, as 4799856961 + 11371663044 = 69281^2 + 106638^2 .

It is not a de Polignac number, because 16171520005 - 2⁹ = 16171519493 is a prime.

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, 1617151996 + ... + 1617152005.

It is an arithmetic number, because the mean of its divisors is an integer number (4851456003).

Almost surely, 2^16171520005 is an apocalyptic number.

It is an amenable number.

16171520005 is a deficient number, since it is larger than the sum of its proper divisors (3234304007).

16171520005 is an equidigital number, since it uses as much as digits as its factorization.

16171520005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234304006.

The product of its (nonzero) digits is 2100, while the sum is 28.

The spelling of 16171520005 in words is "sixteen billion, one hundred seventy-one million, five hundred twenty thousand, five".