1161411238109 has 2 divisors, whose sum is σ = 1161411238110. Its totient is φ = 1161411238108.

The previous prime is 1161411238079. The next prime is 1161411238189. The reversal of 1161411238109 is 9018321141611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1123341374884 + 38069863225 = 1059878^2 + 195115^2 .

It is an emirp because it is prime and its reverse (9018321141611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161411238109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161411238189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580705619054 + 580705619055.

It is an arithmetic number, because the mean of its divisors is an integer number (580705619055).

Almost surely, 2^{1161411238109} is an apocalyptic number.

It is an amenable number.

1161411238109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161411238109 is an equidigital number, since it uses as much as digits as its factorization.

1161411238109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 1161411238109 in words is "one trillion, one hundred sixty-one billion, four hundred eleven million, two hundred thirty-eight thousand, one hundred nine".