161167228738 has 32 divisors (see below), whose sum is σ = 248524174080. Its totient is φ = 78340179840.

The previous prime is 161167228687. The next prime is 161167228787. The reversal of 161167228738 is 837822761161.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 47303031 + ... + 47306437.

It is an arithmetic number, because the mean of its divisors is an integer number (7766380440).

Almost surely, 2^161167228738 is an apocalyptic number.

161167228738 is a deficient number, since it is larger than the sum of its proper divisors (87356945342).

161167228738 is a wasteful number, since it uses less digits than its factorization.

161167228738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322.

The product of its digits is 1354752, while the sum is 52.

Adding to 161167228738 its reverse (837822761161), we get a palindrome (998989989899).

The spelling of 161167228738 in words is "one hundred sixty-one billion, one hundred sixty-seven million, two hundred twenty-eight thousand, seven hundred thirty-eight".