68750638138 has 16 divisors (see below), whose sum is σ = 126924255360. Its totient is φ = 27198054576.

The previous prime is 68750638133. The next prime is 68750638183. The reversal of 68750638138 is 83183605786.

It is not an unprimeable number, because it can be changed into a prime (68750638133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188875198 + ... + 188875561.

It is an arithmetic number, because the mean of its divisors is an integer number (7932765960).

Almost surely, 2^68750638138 is an apocalyptic number.

68750638138 is a deficient number, since it is larger than the sum of its proper divisors (58173617222).

68750638138 is a wasteful number, since it uses less digits than its factorization.

68750638138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377750781.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 68750638138 in words is "sixty-eight billion, seven hundred fifty million, six hundred thirty-eight thousand, one hundred thirty-eight".