16399848889 has 4 divisors (see below), whose sum is σ = 16460815140. Its totient is φ = 16338882640.

The previous prime is 16399848869. The next prime is 16399848893. The reversal of 16399848889 is 98884899361.

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 496621225 + 15903227664 = 22285^2 + 126108^2 .

It is a cyclic number.

It is not a de Polignac number, because 16399848889 - 2³³ = 7809914297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16399848859) 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, 30482722 + ... + 30483259.

It is an arithmetic number, because the mean of its divisors is an integer number (4115203785).

Almost surely, 2^16399848889 is an apocalyptic number.

It is an amenable number.

16399848889 is a deficient number, since it is larger than the sum of its proper divisors (60966251).

16399848889 is an equidigital number, since it uses as much as digits as its factorization.

16399848889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60966250.

The product of its digits is 214990848, while the sum is 73.

The spelling of 16399848889 in words is "sixteen billion, three hundred ninety-nine million, eight hundred forty-eight thousand, eight hundred eighty-nine".