1871660315089 has 2 divisors, whose sum is σ = 1871660315090. Its totient is φ = 1871660315088.

The previous prime is 1871660315071. The next prime is 1871660315101. The reversal of 1871660315089 is 9805130661781.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1788058375489 + 83601939600 = 1337183^2 + 289140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1871660315089 - 2⁷ = 1871660314961 is a prime.

It is a super-2 number, since 2×1871660315089² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1871660315689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 935830157544 + 935830157545.

It is an arithmetic number, because the mean of its divisors is an integer number (935830157545).

Almost surely, 2^{1871660315089} is an apocalyptic number.

It is an amenable number.

1871660315089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1871660315089 is an equidigital number, since it uses as much as digits as its factorization.

1871660315089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 1871660315089 in words is "one trillion, eight hundred seventy-one billion, six hundred sixty million, three hundred fifteen thousand, eighty-nine".