16616179949 has 2 divisors, whose sum is σ = 16616179950. Its totient is φ = 16616179948.

The previous prime is 16616179901. The next prime is 16616179997. The reversal of 16616179949 is 94997161661.

It is a balanced prime because it is at equal distance from previous prime (16616179901) and next prime (16616179997).

It can be written as a sum of positive squares in only one way, i.e., 15652512100 + 963667849 = 125110^2 + 31043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16616179949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16616179999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308089974 + 8308089975.

It is an arithmetic number, because the mean of its divisors is an integer number (8308089975).

Almost surely, 2^16616179949 is an apocalyptic number.

It is an amenable number.

16616179949 is a deficient number, since it is larger than the sum of its proper divisors (1).

16616179949 is an equidigital number, since it uses as much as digits as its factorization.

16616179949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The spelling of 16616179949 in words is "sixteen billion, six hundred sixteen million, one hundred seventy-nine thousand, nine hundred forty-nine".