161440411612 has 24 divisors (see below), whose sum is σ = 282814338800. Its totient is φ = 80636363136.

The previous prime is 161440411589. The next prime is 161440411673. The reversal of 161440411612 is 216114044161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23867743 + ... + 23874505.

Almost surely, 2^161440411612 is an apocalyptic number.

It is an amenable number.

161440411612 is a deficient number, since it is larger than the sum of its proper divisors (121373927188).

161440411612 is a wasteful number, since it uses less digits than its factorization.

161440411612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12085 (or 12083 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

Adding to 161440411612 its reverse (216114044161), we get a palindrome (377554455773).

The spelling of 161440411612 in words is "one hundred sixty-one billion, four hundred forty million, four hundred eleven thousand, six hundred twelve".