16839644149 has 2 divisors, whose sum is σ = 16839644150. Its totient is φ = 16839644148.

The previous prime is 16839644131. The next prime is 16839644179. The reversal of 16839644149 is 94144693861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12994404049 + 3845240100 = 113993^2 + 62010^2 .

It is a cyclic number.

It is not a de Polignac number, because 16839644149 - 2¹¹ = 16839642101 is a prime.

It is a super-3 number, since 3×16839644149³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16839644149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16839644179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8419822074 + 8419822075.

It is an arithmetic number, because the mean of its divisors is an integer number (8419822075).

Almost surely, 2^16839644149 is an apocalyptic number.

It is an amenable number.

16839644149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16839644149 is an equidigital number, since it uses as much as digits as its factorization.

16839644149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 55.

The spelling of 16839644149 in words is "sixteen billion, eight hundred thirty-nine million, six hundred forty-four thousand, one hundred forty-nine".