16601616049 has 2 divisors, whose sum is σ = 16601616050. Its totient is φ = 16601616048.

The previous prime is 16601616019. The next prime is 16601616077. The reversal of 16601616049 is 94061610661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12409960000 + 4191656049 = 111400^2 + 64743^2 .

It is a cyclic number.

It is not a de Polignac number, because 16601616049 - 2³¹ = 14454132401 is a prime.

It is a super-2 number, since 2×16601616049² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16601616019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8300808024 + 8300808025.

It is an arithmetic number, because the mean of its divisors is an integer number (8300808025).

Almost surely, 2^16601616049 is an apocalyptic number.

It is an amenable number.

16601616049 is a deficient number, since it is larger than the sum of its proper divisors (1).

16601616049 is an equidigital number, since it uses as much as digits as its factorization.

16601616049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 16601616049 in words is "sixteen billion, six hundred one million, six hundred sixteen thousand, forty-nine".