1657779807113 has 2 divisors, whose sum is σ = 1657779807114. Its totient is φ = 1657779807112.

The previous prime is 1657779807077. The next prime is 1657779807121. The reversal of 1657779807113 is 3117089777561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1524118640704 + 133661166409 = 1234552^2 + 365597^2 .

It is a cyclic number.

It is not a de Polignac number, because 1657779807113 - 2⁸ = 1657779806857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1657779807613) 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, 828889903556 + 828889903557.

It is an arithmetic number, because the mean of its divisors is an integer number (828889903557).

Almost surely, 2^{1657779807113} is an apocalyptic number.

It is an amenable number.

1657779807113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1657779807113 is an equidigital number, since it uses as much as digits as its factorization.

1657779807113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15558480, while the sum is 62.

The spelling of 1657779807113 in words is "one trillion, six hundred fifty-seven billion, seven hundred seventy-nine million, eight hundred seven thousand, one hundred thirteen".