161129555122 has 8 divisors (see below), whose sum is σ = 241718366700. Its totient is φ = 80556766224.

The previous prime is 161129555087. The next prime is 161129555161. The reversal of 161129555122 is 221555921161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 147003994921 + 14125560201 = 383411^2 + 118851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3980497 + ... + 4020772.

Almost surely, 2^161129555122 is an apocalyptic number.

161129555122 is a deficient number, since it is larger than the sum of its proper divisors (80588811578).

161129555122 is a wasteful number, since it uses less digits than its factorization.

161129555122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8011340.

The product of its digits is 54000, while the sum is 40.

The spelling of 161129555122 in words is "one hundred sixty-one billion, one hundred twenty-nine million, five hundred fifty-five thousand, one hundred twenty-two".