16434072505 has 4 divisors (see below), whose sum is σ = 19720887012. Its totient is φ = 13147258000.

The previous prime is 16434072503. The next prime is 16434072511. The reversal of 16434072505 is 50527043461.

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 10548727849 + 5885344656 = 102707^2 + 76716^2 .

It is not a de Polignac number, because 16434072505 - 2¹ = 16434072503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16434072503) 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, 1643407246 + ... + 1643407255.

It is an arithmetic number, because the mean of its divisors is an integer number (4930221753).

Almost surely, 2^16434072505 is an apocalyptic number.

It is an amenable number.

16434072505 is a deficient number, since it is larger than the sum of its proper divisors (3286814507).

16434072505 is an equidigital number, since it uses as much as digits as its factorization.

16434072505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286814506.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 16434072505 in words is "sixteen billion, four hundred thirty-four million, seventy-two thousand, five hundred five".