161099137471 has 2 divisors, whose sum is σ = 161099137472. Its totient is φ = 161099137470.

The previous prime is 161099137447. The next prime is 161099137489. The reversal of 161099137471 is 174731990161.

It is a strong prime.

It is an emirp because it is prime and its reverse (174731990161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161099137471 - 2³⁷ = 23660183999 is a prime.

It is a super-3 number, since 3×161099137471³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161099138471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80549568735 + 80549568736.

It is an arithmetic number, because the mean of its divisors is an integer number (80549568736).

Almost surely, 2^161099137471 is an apocalyptic number.

161099137471 is a deficient number, since it is larger than the sum of its proper divisors (1).

161099137471 is an equidigital number, since it uses as much as digits as its factorization.

161099137471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 161099137471 in words is "one hundred sixty-one billion, ninety-nine million, one hundred thirty-seven thousand, four hundred seventy-one".