161317454722 has 16 divisors (see below), whose sum is σ = 252254962944. Its totient is φ = 77283990000.

The previous prime is 161317454693. The next prime is 161317454723. The reversal of 161317454722 is 227454713161.

It is not an unprimeable number, because it can be changed into a prime (161317454723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12874404 + ... + 12886927.

It is an arithmetic number, because the mean of its divisors is an integer number (15765935184).

Almost surely, 2^161317454722 is an apocalyptic number.

161317454722 is a deficient number, since it is larger than the sum of its proper divisors (90937508222).

161317454722 is a wasteful number, since it uses less digits than its factorization.

161317454722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25761465.

The product of its digits is 282240, while the sum is 43.

The spelling of 161317454722 in words is "one hundred sixty-one billion, three hundred seventeen million, four hundred fifty-four thousand, seven hundred twenty-two".