16857777775841 has 2 divisors, whose sum is σ = 16857777775842. Its totient is φ = 16857777775840.

The previous prime is 16857777775829. The next prime is 16857777775903. The reversal of 16857777775841 is 14857777775861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15182875903441 + 1674901872400 = 3896521^2 + 1294180^2 .

It is a cyclic number.

It is not a de Polignac number, because 16857777775841 - 2³⁰ = 16856704034017 is a prime.

It is not a weakly prime, because it can be changed into another prime (16857777775801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8428888887920 + 8428888887921.

It is an arithmetic number, because the mean of its divisors is an integer number (8428888887921).

Almost surely, 2^{16857777775841} is an apocalyptic number.

It is an amenable number.

16857777775841 is a deficient number, since it is larger than the sum of its proper divisors (1).

16857777775841 is an equidigital number, since it uses as much as digits as its factorization.

16857777775841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4517721600, while the sum is 80.

The spelling of 16857777775841 in words is "sixteen trillion, eight hundred fifty-seven billion, seven hundred seventy-seven million, seven hundred seventy-five thousand, eight hundred forty-one".