68140043493 has 8 divisors (see below), whose sum is σ = 90862428000. Its totient is φ = 45422177328.

The previous prime is 68140043479. The next prime is 68140043497. The reversal of 68140043493 is 39434004186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68140043493 - 2⁶ = 68140043429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68140043497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094238 + ... + 1154831.

It is an arithmetic number, because the mean of its divisors is an integer number (11357803500).

Almost surely, 2^68140043493 is an apocalyptic number.

It is an amenable number.

68140043493 is a deficient number, since it is larger than the sum of its proper divisors (22722384507).

68140043493 is a wasteful number, since it uses less digits than its factorization.

68140043493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259171.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 68140043493 in words is "sixty-eight billion, one hundred forty million, forty-three thousand, four hundred ninety-three".