1871097116081 has 2 divisors, whose sum is σ = 1871097116082. Its totient is φ = 1871097116080.

The previous prime is 1871097115981. The next prime is 1871097116171. The reversal of 1871097116081 is 1806117901781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1846565725456 + 24531390625 = 1358884^2 + 156625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1871097116081 - 2¹⁰ = 1871097115057 is a prime.

It is a super-2 number, since 2×1871097116081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1871097110081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 935548558040 + 935548558041.

It is an arithmetic number, because the mean of its divisors is an integer number (935548558041).

Almost surely, 2^{1871097116081} is an apocalyptic number.

It is an amenable number.

1871097116081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1871097116081 is an equidigital number, since it uses as much as digits as its factorization.

1871097116081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 50.

The spelling of 1871097116081 in words is "one trillion, eight hundred seventy-one billion, ninety-seven million, one hundred sixteen thousand, eighty-one".