68138173838 has 8 divisors (see below), whose sum is σ = 116808298032. Its totient is φ = 29202074496.

The previous prime is 68138173837. The next prime is 68138173861. The reversal of 68138173838 is 83837183186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68138173837) 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, 2433506195 + ... + 2433506222.

It is an arithmetic number, because the mean of its divisors is an integer number (14601037254).

Almost surely, 2^68138173838 is an apocalyptic number.

68138173838 is a deficient number, since it is larger than the sum of its proper divisors (48670124194).

68138173838 is a wasteful number, since it uses less digits than its factorization.

68138173838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4867012426.

The product of its digits is 4644864, while the sum is 56.

The spelling of 68138173838 in words is "sixty-eight billion, one hundred thirty-eight million, one hundred seventy-three thousand, eight hundred thirty-eight".