161345687368 has 32 divisors (see below), whose sum is σ = 313111063800. Its totient is φ = 77852178432.

The previous prime is 161345687357. The next prime is 161345687369. The reversal of 161345687368 is 863786543161.

161345687368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 150884079844 + 10461607524 = 388438^2 + 102282^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (161345687369) 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 7 ways as a sum of consecutive naturals, for example, 295546 + ... + 640342.

Almost surely, 2^161345687368 is an apocalyptic number.

It is an amenable number.

161345687368 is a deficient number, since it is larger than the sum of its proper divisors (151765376432).

161345687368 is a wasteful number, since it uses less digits than its factorization.

161345687368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346849 (or 346845 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 58.

The spelling of 161345687368 in words is "one hundred sixty-one billion, three hundred forty-five million, six hundred eighty-seven thousand, three hundred sixty-eight".