68211386879 has 8 divisors (see below), whose sum is σ = 71842308480. Its totient is φ = 64635899416.

The previous prime is 68211386851. The next prime is 68211386927. The reversal of 68211386879 is 97868311286.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68211386879 is a prime.

It is a super-2 number, since 2×68211386879² (a number of 22 digits) contains 22 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 (68211286879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13856009 + ... + 13860930.

It is an arithmetic number, because the mean of its divisors is an integer number (8980288560).

Almost surely, 2^68211386879 is an apocalyptic number.

68211386879 is a deficient number, since it is larger than the sum of its proper divisors (3630921601).

68211386879 is a wasteful number, since it uses less digits than its factorization.

68211386879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27717069.

The product of its digits is 6967296, while the sum is 59.

The spelling of 68211386879 in words is "sixty-eight billion, two hundred eleven million, three hundred eighty-six thousand, eight hundred seventy-nine".