16172223433 has 4 divisors (see below), whose sum is σ = 16729886340. Its totient is φ = 15614560528.

The previous prime is 16172223421. The next prime is 16172223439. The reversal of 16172223433 is 33432227161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3843008064 + 12329215369 = 61992^2 + 111037^2 .

It is a cyclic number.

It is not a de Polignac number, because 16172223433 - 2¹⁷ = 16172092361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16172223439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278831410 + ... + 278831467.

It is an arithmetic number, because the mean of its divisors is an integer number (4182471585).

Almost surely, 2^16172223433 is an apocalyptic number.

It is an amenable number.

16172223433 is a deficient number, since it is larger than the sum of its proper divisors (557662907).

16172223433 is an equidigital number, since it uses as much as digits as its factorization.

16172223433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557662906.

The product of its digits is 36288, while the sum is 34.

The spelling of 16172223433 in words is "sixteen billion, one hundred seventy-two million, two hundred twenty-three thousand, four hundred thirty-three".