161271735326 has 16 divisors (see below), whose sum is σ = 260618110368. Its totient is φ = 74403900000.

The previous prime is 161271735301. The next prime is 161271735329. The reversal of 161271735326 is 623537172161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161271735329) 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 in 7 ways as a sum of consecutive naturals, for example, 1149425 + ... + 1282076.

It is an arithmetic number, because the mean of its divisors is an integer number (16288631898).

Almost surely, 2^161271735326 is an apocalyptic number.

161271735326 is a deficient number, since it is larger than the sum of its proper divisors (99346375042).

161271735326 is a wasteful number, since it uses less digits than its factorization.

161271735326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434067.

The product of its digits is 317520, while the sum is 44.

The spelling of 161271735326 in words is "one hundred sixty-one billion, two hundred seventy-one million, seven hundred thirty-five thousand, three hundred twenty-six".