16254404421 has 8 divisors (see below), whose sum is σ = 21802315584. Its totient is φ = 10771381440.

The previous prime is 16254404401. The next prime is 16254404443. The reversal of 16254404421 is 12440445261.

16254404421 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 not a de Polignac number, because 16254404421 - 2⁵ = 16254404389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16254404401) 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, 16221460 + ... + 16222461.

It is an arithmetic number, because the mean of its divisors is an integer number (2725289448).

Almost surely, 2^16254404421 is an apocalyptic number.

It is an amenable number.

16254404421 is a deficient number, since it is larger than the sum of its proper divisors (5547911163).

16254404421 is a wasteful number, since it uses less digits than its factorization.

16254404421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32444091.

The product of its (nonzero) digits is 30720, while the sum is 33.

Adding to 16254404421 its reverse (12440445261), we get a palindrome (28694849682).

The spelling of 16254404421 in words is "sixteen billion, two hundred fifty-four million, four hundred four thousand, four hundred twenty-one".