68197679185 has 16 divisors (see below), whose sum is σ = 84487767552. Its totient is φ = 52791552000.

The previous prime is 68197679171. The next prime is 68197679191. The reversal of 68197679185 is 58197679186.

It is a happy number.

It is not a de Polignac number, because 68197679185 - 2¹⁵ = 68197646417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68197679185.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1465242 + ... + 1511068.

It is an arithmetic number, because the mean of its divisors is an integer number (5280485472).

Almost surely, 2^68197679185 is an apocalyptic number.

It is an amenable number.

68197679185 is a deficient number, since it is larger than the sum of its proper divisors (16290088367).

68197679185 is a wasteful number, since it uses less digits than its factorization.

68197679185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55464.

The product of its digits is 45722880, while the sum is 67.

Subtracting from 68197679185 its reverse (58197679186), we obtain a palindrome (9999999999).

The spelling of 68197679185 in words is "sixty-eight billion, one hundred ninety-seven million, six hundred seventy-nine thousand, one hundred eighty-five".