68542926871 has 4 divisors (see below), whose sum is σ = 68829717600. Its totient is φ = 68256136144.

The previous prime is 68542926847. The next prime is 68542926889. The reversal of 68542926871 is 17862924586.

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 68542926871 - 2²⁵ = 68509372439 is a prime.

It is a super-4 number, since 4×68542926871⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68542926811) 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, 143395006 + ... + 143395483.

It is an arithmetic number, because the mean of its divisors is an integer number (17207429400).

Almost surely, 2^68542926871 is an apocalyptic number.

68542926871 is a deficient number, since it is larger than the sum of its proper divisors (286790729).

68542926871 is a wasteful number, since it uses less digits than its factorization.

68542926871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286790728.

The product of its digits is 11612160, while the sum is 58.

The spelling of 68542926871 in words is "sixty-eight billion, five hundred forty-two million, nine hundred twenty-six thousand, eight hundred seventy-one".