68719738881 has 8 divisors (see below), whose sum is σ = 91627717984. Its totient is φ = 45812459520.

The previous prime is 68719738873. The next prime is 68719738889. The reversal of 68719738881 is 18883791786.

68719738881 is nontrivially palindromic in base 2, base 4 and base 8.

It is an interprime number because it is at equal distance from previous prime (68719738873) and next prime (68719738889).

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

It is not a de Polignac number, because 68719738881 - 2³ = 68719738873 is a prime.

It is a super-2 number, since 2×68719738881² (a number of 22 digits) contains 22 as substring.

It is the 262145-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68719738889) by changing a digit.

It is a nontrivial repunit in base 262144.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130305 + ... + 392961.

It is an arithmetic number, because the mean of its divisors is an integer number (11453464748).

Almost surely, 2^68719738881 is an apocalyptic number.

It is an amenable number.

68719738881 is a deficient number, since it is larger than the sum of its proper divisors (22907979103).

68719738881 is a wasteful number, since it uses less digits than its factorization.

68719738881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349871.

The product of its digits is 32514048, while the sum is 66.

The spelling of 68719738881 in words is "sixty-eight billion, seven hundred nineteen million, seven hundred thirty-eight thousand, eight hundred eighty-one".