161341513117 has 2 divisors, whose sum is σ = 161341513118. Its totient is φ = 161341513116.

The previous prime is 161341513111. The next prime is 161341513121. The reversal of 161341513117 is 711315143161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123412392601 + 37929120516 = 351301^2 + 194754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161341513117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161341513111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80670756558 + 80670756559.

It is an arithmetic number, because the mean of its divisors is an integer number (80670756559).

Almost surely, 2^161341513117 is an apocalyptic number.

It is an amenable number.

161341513117 is a deficient number, since it is larger than the sum of its proper divisors (1).

161341513117 is an equidigital number, since it uses as much as digits as its factorization.

161341513117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 34.

Adding to 161341513117 its reverse (711315143161), we get a palindrome (872656656278).

It can be divided in two parts, 16134 and 1513117, that added together give a palindrome (1529251).

The spelling of 161341513117 in words is "one hundred sixty-one billion, three hundred forty-one million, five hundred thirteen thousand, one hundred seventeen".