16171254421 has 8 divisors (see below), whose sum is σ = 18874656000. Its totient is φ = 13566158448.

The previous prime is 16171254413. The next prime is 16171254431. The reversal of 16171254421 is 12445217161.

16171254421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16171254421 - 2³ = 16171254413 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 (16171254401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24576046 + ... + 24576703.

It is an arithmetic number, because the mean of its divisors is an integer number (2359332000).

Almost surely, 2^16171254421 is an apocalyptic number.

It is an amenable number.

16171254421 is a deficient number, since it is larger than the sum of its proper divisors (2703401579).

16171254421 is an equidigital number, since it uses as much as digits as its factorization.

16171254421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49152803.

The product of its digits is 13440, while the sum is 34.

The spelling of 16171254421 in words is "sixteen billion, one hundred seventy-one million, two hundred fifty-four thousand, four hundred twenty-one".