168619445338 has 4 divisors (see below), whose sum is σ = 252929168010. Its totient is φ = 84309722668.

The previous prime is 168619445333. The next prime is 168619445339. The reversal of 168619445338 is 833544916861.

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

It can be written as a sum of positive squares in only one way, i.e., 134793982449 + 33825462889 = 367143^2 + 183917^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (168619445333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42154861333 + ... + 42154861336.

Almost surely, 2^168619445338 is an apocalyptic number.

168619445338 is a deficient number, since it is larger than the sum of its proper divisors (84309722672).

168619445338 is an equidigital number, since it uses as much as digits as its factorization.

168619445338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84309722671.

The product of its digits is 14929920, while the sum is 58.

The spelling of 168619445338 in words is "one hundred sixty-eight billion, six hundred nineteen million, four hundred forty-five thousand, three hundred thirty-eight".