161103876617 has 2 divisors, whose sum is σ = 161103876618. Its totient is φ = 161103876616.

The previous prime is 161103876569. The next prime is 161103876709. The reversal of 161103876617 is 716678301161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130289233936 + 30814642681 = 360956^2 + 175541^2 .

It is an emirp because it is prime and its reverse (716678301161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161103876617 - 2¹⁸ = 161103614473 is a prime.

It is a super-2 number, since 2×161103876617² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161103876517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80551938308 + 80551938309.

It is an arithmetic number, because the mean of its divisors is an integer number (80551938309).

Almost surely, 2^161103876617 is an apocalyptic number.

It is an amenable number.

161103876617 is a deficient number, since it is larger than the sum of its proper divisors (1).

161103876617 is an equidigital number, since it uses as much as digits as its factorization.

161103876617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 161103876617 in words is "one hundred sixty-one billion, one hundred three million, eight hundred seventy-six thousand, six hundred seventeen".