16438295849 has 2 divisors, whose sum is σ = 16438295850. Its totient is φ = 16438295848.

The previous prime is 16438295827. The next prime is 16438295897. The reversal of 16438295849 is 94859283461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15934517824 + 503778025 = 126232^2 + 22445^2 .

It is an emirp because it is prime and its reverse (94859283461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16438295849 is a prime.

It is not a weakly prime, because it can be changed into another prime (16438295149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8219147924 + 8219147925.

It is an arithmetic number, because the mean of its divisors is an integer number (8219147925).

Almost surely, 2^16438295849 is an apocalyptic number.

It is an amenable number.

16438295849 is a deficient number, since it is larger than the sum of its proper divisors (1).

16438295849 is an equidigital number, since it uses as much as digits as its factorization.

16438295849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14929920, while the sum is 59.

The spelling of 16438295849 in words is "sixteen billion, four hundred thirty-eight million, two hundred ninety-five thousand, eight hundred forty-nine".