16233478409 has 4 divisors (see below), whose sum is σ = 16394206020. Its totient is φ = 16072750800.

The previous prime is 16233478403. The next prime is 16233478439. The reversal of 16233478409 is 90487433261.

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 13905126400 + 2328352009 = 117920^2 + 48253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16233478409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16233478403) 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, 80363654 + ... + 80363855.

It is an arithmetic number, because the mean of its divisors is an integer number (4098551505).

Almost surely, 2^16233478409 is an apocalyptic number.

It is an amenable number.

16233478409 is a deficient number, since it is larger than the sum of its proper divisors (160727611).

16233478409 is a wasteful number, since it uses less digits than its factorization.

16233478409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160727610.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 16233478409 in words is "sixteen billion, two hundred thirty-three million, four hundred seventy-eight thousand, four hundred nine".