16498249389409 has 2 divisors, whose sum is σ = 16498249389410. Its totient is φ = 16498249389408.

The previous prime is 16498249389379. The next prime is 16498249389421. The reversal of 16498249389409 is 90498394289461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16155954185809 + 342295203600 = 4019447^2 + 585060^2 .

It is an emirp because it is prime and its reverse (90498394289461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16498249389409 is a prime.

It is not a weakly prime, because it can be changed into another prime (16498249389709) 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, 8249124694704 + 8249124694705.

It is an arithmetic number, because the mean of its divisors is an integer number (8249124694705).

Almost surely, 2^{16498249389409} is an apocalyptic number.

It is an amenable number.

16498249389409 is a deficient number, since it is larger than the sum of its proper divisors (1).

16498249389409 is an equidigital number, since it uses as much as digits as its factorization.

16498249389409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967458816, while the sum is 76.

The spelling of 16498249389409 in words is "sixteen trillion, four hundred ninety-eight billion, two hundred forty-nine million, three hundred eighty-nine thousand, four hundred nine".