68816083638 has 8 divisors (see below), whose sum is σ = 137632167288. Its totient is φ = 22938694544.

The previous prime is 68816083631. The next prime is 68816083643. The reversal of 68816083638 is 83638061886.

It is a happy number.

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

68816083638 is an admirable number.

It is a super-2 number, since 2×68816083638² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68816083631) 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, 5734673631 + ... + 5734673642.

It is an arithmetic number, because the mean of its divisors is an integer number (17204020911).

Almost surely, 2^68816083638 is an apocalyptic number.

68816083638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68816083638 is a wasteful number, since it uses less digits than its factorization.

68816083638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11469347278.

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 68816083638 in words is "sixty-eight billion, eight hundred sixteen million, eighty-three thousand, six hundred thirty-eight".