16798040849 has 2 divisors, whose sum is σ = 16798040850. Its totient is φ = 16798040848.

The previous prime is 16798040843. The next prime is 16798040899. The reversal of 16798040849 is 94804089761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10433192449 + 6364848400 = 102143^2 + 79780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16798040849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16798040794 and 16798040803.

It is not a weakly prime, because it can be changed into another prime (16798040843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8399020424 + 8399020425.

It is an arithmetic number, because the mean of its divisors is an integer number (8399020425).

Almost surely, 2^16798040849 is an apocalyptic number.

It is an amenable number.

16798040849 is a deficient number, since it is larger than the sum of its proper divisors (1).

16798040849 is an equidigital number, since it uses as much as digits as its factorization.

16798040849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 16798040849 in words is "sixteen billion, seven hundred ninety-eight million, forty thousand, eight hundred forty-nine".