16433256256221 has 16 divisors (see below), whose sum is σ = 25041595746944. Its totient is φ = 9390265887744.

The previous prime is 16433256256181. The next prime is 16433256256229. The reversal of 16433256256221 is 12265265233461.

It is not a de Polignac number, because 16433256256221 - 2¹⁰ = 16433256255197 is a prime.

It is a super-2 number, since 2×16433256256221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16433256256229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5708116 + ... + 8090061.

It is an arithmetic number, because the mean of its divisors is an integer number (1565099734184).

Almost surely, 2^{16433256256221} is an apocalyptic number.

It is an amenable number.

16433256256221 is a deficient number, since it is larger than the sum of its proper divisors (8608339490723).

16433256256221 is a wasteful number, since it uses less digits than its factorization.

16433256256221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13854900.

The product of its digits is 3110400, while the sum is 48.

The spelling of 16433256256221 in words is "sixteen trillion, four hundred thirty-three billion, two hundred fifty-six million, two hundred fifty-six thousand, two hundred twenty-one".