168216937243 has 4 divisors (see below), whose sum is σ = 168367535440. Its totient is φ = 168066339048.

The previous prime is 168216937241. The next prime is 168216937253. The reversal of 168216937243 is 342739612861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168216937243 - 2¹ = 168216937241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168216937241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 75297423 + ... + 75299656.

It is an arithmetic number, because the mean of its divisors is an integer number (42091883860).

Almost surely, 2^168216937243 is an apocalyptic number.

168216937243 is a deficient number, since it is larger than the sum of its proper divisors (150598197).

168216937243 is a wasteful number, since it uses less digits than its factorization.

168216937243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150598196.

The product of its digits is 2612736, while the sum is 52.

The spelling of 168216937243 in words is "one hundred sixty-eight billion, two hundred sixteen million, nine hundred thirty-seven thousand, two hundred forty-three".