1655887982171 has 2 divisors, whose sum is σ = 1655887982172. Its totient is φ = 1655887982170.

The previous prime is 1655887982093. The next prime is 1655887982207. The reversal of 1655887982171 is 1712897885561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1655887982171 - 2¹⁰ = 1655887981147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1655887982471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827943991085 + 827943991086.

It is an arithmetic number, because the mean of its divisors is an integer number (827943991086).

Almost surely, 2^{1655887982171} is an apocalyptic number.

1655887982171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655887982171 is an equidigital number, since it uses as much as digits as its factorization.

1655887982171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67737600, while the sum is 68.

The spelling of 1655887982171 in words is "one trillion, six hundred fifty-five billion, eight hundred eighty-seven million, nine hundred eighty-two thousand, one hundred seventy-one".