1606557888049 has 2 divisors, whose sum is σ = 1606557888050. Its totient is φ = 1606557888048.

The previous prime is 1606557887999. The next prime is 1606557888071. The reversal of 1606557888049 is 9408887556061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1586420859024 + 20137029025 = 1259532^2 + 141905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606557888049 - 2²³ = 1606549499441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1606557858049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803278944024 + 803278944025.

It is an arithmetic number, because the mean of its divisors is an integer number (803278944025).

Almost surely, 2^{1606557888049} is an apocalyptic number.

It is an amenable number.

1606557888049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606557888049 is an equidigital number, since it uses as much as digits as its factorization.

1606557888049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116121600, while the sum is 67.

The spelling of 1606557888049 in words is "one trillion, six hundred six billion, five hundred fifty-seven million, eight hundred eighty-eight thousand, forty-nine".