68042421471 has 4 divisors (see below), whose sum is σ = 90723228632. Its totient is φ = 45361614312.

The previous prime is 68042421439. The next prime is 68042421497. The reversal of 68042421471 is 17412424086.

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

It is not a de Polignac number, because 68042421471 - 2⁵ = 68042421439 is a prime.

It is a super-3 number, since 3×68042421471³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68042421071) 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, 11340403576 + ... + 11340403581.

It is an arithmetic number, because the mean of its divisors is an integer number (22680807158).

Almost surely, 2^68042421471 is an apocalyptic number.

68042421471 is a deficient number, since it is larger than the sum of its proper divisors (22680807161).

68042421471 is a wasteful number, since it uses less digits than its factorization.

68042421471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22680807160.

The product of its (nonzero) digits is 86016, while the sum is 39.

The spelling of 68042421471 in words is "sixty-eight billion, forty-two million, four hundred twenty-one thousand, four hundred seventy-one".