161517286881334 has 4 divisors (see below), whose sum is σ = 242275930322004. Its totient is φ = 80758643440666.

The previous prime is 161517286881229. The next prime is 161517286881361. The reversal of 161517286881334 is 433188682715161.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40379321720332 + ... + 40379321720335.

It is an arithmetic number, because the mean of its divisors is an integer number (60568982580501).

Almost surely, 2^{161517286881334} is an apocalyptic number.

161517286881334 is a deficient number, since it is larger than the sum of its proper divisors (80758643440670).

161517286881334 is an equidigital number, since it uses as much as digits as its factorization.

161517286881334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80758643440669.

The product of its digits is 46448640, while the sum is 64.

The spelling of 161517286881334 in words is "one hundred sixty-one trillion, five hundred seventeen billion, two hundred eighty-six million, eight hundred eighty-one thousand, three hundred thirty-four".