161779355314522 has 16 divisors (see below), whose sum is σ = 264733111567872. Its totient is φ = 73535165759520.

The previous prime is 161779355314517. The next prime is 161779355314523. The reversal of 161779355314522 is 225413553977161.

It is not an unprimeable number, because it can be changed into a prime (161779355314523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43411683 + ... + 46990774.

It is an arithmetic number, because the mean of its divisors is an integer number (16545819472992).

Almost surely, 2^{161779355314522} is an apocalyptic number.

161779355314522 is a deficient number, since it is larger than the sum of its proper divisors (102953756253350).

161779355314522 is a wasteful number, since it uses less digits than its factorization.

161779355314522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90483813.

The product of its digits is 47628000, while the sum is 61.

The spelling of 161779355314522 in words is "one hundred sixty-one trillion, seven hundred seventy-nine billion, three hundred fifty-five million, three hundred fourteen thousand, five hundred twenty-two".