16989449753 has 2 divisors, whose sum is σ = 16989449754. Its totient is φ = 16989449752.

The previous prime is 16989449717. The next prime is 16989449761. The reversal of 16989449753 is 35794498961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15343281424 + 1646168329 = 123868^2 + 40573^2 .

It is a cyclic number.

It is not a de Polignac number, because 16989449753 - 2³² = 12694482457 is a prime.

It is a super-2 number, since 2×16989449753² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16989449753.

It is not a weakly prime, because it can be changed into another prime (16989449453) 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, 8494724876 + 8494724877.

It is an arithmetic number, because the mean of its divisors is an integer number (8494724877).

Almost surely, 2^16989449753 is an apocalyptic number.

It is an amenable number.

16989449753 is a deficient number, since it is larger than the sum of its proper divisors (1).

16989449753 is an equidigital number, since it uses as much as digits as its factorization.

16989449753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58786560, while the sum is 65.

The spelling of 16989449753 in words is "sixteen billion, nine hundred eighty-nine million, four hundred forty-nine thousand, seven hundred fifty-three".