161266121116 has 12 divisors (see below), whose sum is σ = 282218708520. Its totient is φ = 80632204400.

The previous prime is 161266121111. The next prime is 161266121119. The reversal of 161266121116 is 611121662161.

161266121116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161266121111) 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 3 ways as a sum of consecutive naturals, for example, 415515 + ... + 703693.

It is an arithmetic number, because the mean of its divisors is an integer number (23518225710).

Almost surely, 2^161266121116 is an apocalyptic number.

It is an amenable number.

161266121116 is a deficient number, since it is larger than the sum of its proper divisors (120952587404).

161266121116 is a wasteful number, since it uses less digits than its factorization.

161266121116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428084 (or 428082 counting only the distinct ones).

The product of its digits is 5184, while the sum is 34.

Adding to 161266121116 its reverse (611121662161), we get a palindrome (772387783277).

The spelling of 161266121116 in words is "one hundred sixty-one billion, two hundred sixty-six million, one hundred twenty-one thousand, one hundred sixteen".