178672163242 has 4 divisors (see below), whose sum is σ = 268008244866. Its totient is φ = 89336081620.

The previous prime is 178672163221. The next prime is 178672163279. The reversal of 178672163242 is 242361276871.

178672163242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242361276871 = 7 ⋅34623039553.

It can be written as a sum of positive squares in only one way, i.e., 100261522881 + 78410640361 = 316641^2 + 280019^2 .

It is a super-3 number, since 3×178672163242³ (a number of 35 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 44668040809 + ... + 44668040812.

Almost surely, 2^178672163242 is an apocalyptic number.

178672163242 is a deficient number, since it is larger than the sum of its proper divisors (89336081624).

178672163242 is an equidigital number, since it uses as much as digits as its factorization.

178672163242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89336081623.

The product of its digits is 1354752, while the sum is 49.

The spelling of 178672163242 in words is "one hundred seventy-eight billion, six hundred seventy-two million, one hundred sixty-three thousand, two hundred forty-two".