16433246572421 has 6 divisors (see below), whose sum is σ = 19116225604710. Its totient is φ = 14085639919176.

The previous prime is 16433246572331. The next prime is 16433246572429. The reversal of 16433246572421 is 12427564233461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9207977836225 + 7225268736196 = 3034465^2 + 2687986^2 .

It is not a de Polignac number, because 16433246572421 - 2¹⁸ = 16433246310277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16433246572421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16433246572429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167686189466 + ... + 167686189563.

It is an arithmetic number, because the mean of its divisors is an integer number (3186037600785).

Almost surely, 2^{16433246572421} is an apocalyptic number.

It is an amenable number.

16433246572421 is a deficient number, since it is larger than the sum of its proper divisors (2682979032289).

16433246572421 is an equidigital number, since it uses as much as digits as its factorization.

16433246572421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335372379043 (or 335372379036 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 50.

The spelling of 16433246572421 in words is "sixteen trillion, four hundred thirty-three billion, two hundred forty-six million, five hundred seventy-two thousand, four hundred twenty-one".