1171601838109 has 2 divisors, whose sum is σ = 1171601838110. Its totient is φ = 1171601838108.

The previous prime is 1171601838097. The next prime is 1171601838137. The reversal of 1171601838109 is 9018381061711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109697910084 + 61903928025 = 1053422^2 + 248805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171601838109 - 2¹⁹ = 1171601313821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171601838139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585800919054 + 585800919055.

It is an arithmetic number, because the mean of its divisors is an integer number (585800919055).

Almost surely, 2^{1171601838109} is an apocalyptic number.

It is an amenable number.

1171601838109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171601838109 is an equidigital number, since it uses as much as digits as its factorization.

1171601838109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 46.

The spelling of 1171601838109 in words is "one trillion, one hundred seventy-one billion, six hundred one million, eight hundred thirty-eight thousand, one hundred nine".