16434618749 has 2 divisors, whose sum is σ = 16434618750. Its totient is φ = 16434618748.

The previous prime is 16434618677. The next prime is 16434618763. The reversal of 16434618749 is 94781643461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11853765625 + 4580853124 = 108875^2 + 67682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16434618749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16434618749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16434618149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8217309374 + 8217309375.

It is an arithmetic number, because the mean of its divisors is an integer number (8217309375).

Almost surely, 2^16434618749 is an apocalyptic number.

It is an amenable number.

16434618749 is a deficient number, since it is larger than the sum of its proper divisors (1).

16434618749 is an equidigital number, since it uses as much as digits as its factorization.

16434618749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 53.

The spelling of 16434618749 in words is "sixteen billion, four hundred thirty-four million, six hundred eighteen thousand, seven hundred forty-nine".