161286174035897 has 2 divisors, whose sum is σ = 161286174035898. Its totient is φ = 161286174035896.

The previous prime is 161286174035729. The next prime is 161286174035911. The reversal of 161286174035897 is 798530471682161.

161286174035897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158234989564201 + 3051184471696 = 12579149^2 + 1746764^2 .

It is a cyclic number.

It is not a de Polignac number, because 161286174035897 - 2²⁸ = 161285905600441 is a prime.

It is not a weakly prime, because it can be changed into another prime (161286174065897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80643087017948 + 80643087017949.

It is an arithmetic number, because the mean of its divisors is an integer number (80643087017949).

It is a 1-persistent number, because it is pandigital, but 2⋅161286174035897 = 322572348071794 is not.

Almost surely, 2^{161286174035897} is an apocalyptic number.

It is an amenable number.

161286174035897 is a deficient number, since it is larger than the sum of its proper divisors (1).

161286174035897 is an equidigital number, since it uses as much as digits as its factorization.

161286174035897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 121927680, while the sum is 68.

The spelling of 161286174035897 in words is "one hundred sixty-one trillion, two hundred eighty-six billion, one hundred seventy-four million, thirty-five thousand, eight hundred ninety-seven".