168040426279 has 4 divisors (see below), whose sum is σ = 183316828680. Its totient is φ = 152764023880.

The previous prime is 168040426261. The next prime is 168040426319. The reversal of 168040426279 is 972624040861.

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 168040426279 - 2⁹ = 168040425767 is a prime.

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 a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168040426219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7638201184 + ... + 7638201205.

It is an arithmetic number, because the mean of its divisors is an integer number (45829207170).

Almost surely, 2^168040426279 is an apocalyptic number.

168040426279 is a deficient number, since it is larger than the sum of its proper divisors (15276402401).

168040426279 is a wasteful number, since it uses less digits than its factorization.

168040426279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15276402400.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 168040426279 in words is "one hundred sixty-eight billion, forty million, four hundred twenty-six thousand, two hundred seventy-nine".