1606557803779 has 2 divisors, whose sum is σ = 1606557803780. Its totient is φ = 1606557803778.

The previous prime is 1606557803717. The next prime is 1606557803827. The reversal of 1606557803779 is 9773087556061.

It is a strong prime.

It is an emirp because it is prime and its reverse (9773087556061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1606557803779 - 2²⁷ = 1606423586051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1606557803779.

It is not a weakly prime, because it can be changed into another prime (1606557804779) 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, 803278901889 + 803278901890.

It is an arithmetic number, because the mean of its divisors is an integer number (803278901890).

Almost surely, 2^{1606557803779} is an apocalyptic number.

1606557803779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606557803779 is an equidigital number, since it uses as much as digits as its factorization.

1606557803779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66679200, while the sum is 64.

The spelling of 1606557803779 in words is "one trillion, six hundred six billion, five hundred fifty-seven million, eight hundred three thousand, seven hundred seventy-nine".