16171504423 has 4 divisors (see below), whose sum is σ = 16693165888. Its totient is φ = 15649842960.

The previous prime is 16171504421. The next prime is 16171504429. The reversal of 16171504423 is 32440517161.

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

It is a cyclic number.

It is not a de Polignac number, because 16171504423 - 2¹ = 16171504421 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 (16171504421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260830686 + ... + 260830747.

It is an arithmetic number, because the mean of its divisors is an integer number (4173291472).

Almost surely, 2^16171504423 is an apocalyptic number.

16171504423 is a deficient number, since it is larger than the sum of its proper divisors (521661465).

16171504423 is an equidigital number, since it uses as much as digits as its factorization.

16171504423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521661464.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 16171504423 in words is "sixteen billion, one hundred seventy-one million, five hundred four thousand, four hundred twenty-three".