161500222406 has 16 divisors (see below), whose sum is σ = 243201087360. Its totient is φ = 80433317760.

The previous prime is 161500222399. The next prime is 161500222439. The reversal of 161500222406 is 604222005161.

161500222406 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 an unprimeable number.

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, 2821451 + ... + 2878121.

It is an arithmetic number, because the mean of its divisors is an integer number (15200067960).

Almost surely, 2^161500222406 is an apocalyptic number.

161500222406 is a deficient number, since it is larger than the sum of its proper divisors (81700864954).

161500222406 is a wasteful number, since it uses less digits than its factorization.

161500222406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62239.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 161500222406 its reverse (604222005161), we get a palindrome (765722227567).

The spelling of 161500222406 in words is "one hundred sixty-one billion, five hundred million, two hundred twenty-two thousand, four hundred six".