68618171838 has 16 divisors (see below), whose sum is σ = 137239407360. Its totient is φ = 22872213336.

The previous prime is 68618171837. The next prime is 68618171857. The reversal of 68618171838 is 83817181686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68618171837) 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, 249003 + ... + 446361.

It is an arithmetic number, because the mean of its divisors is an integer number (8577462960).

Almost surely, 2^68618171838 is an apocalyptic number.

68618171838 is an abundant number, since it is smaller than the sum of its proper divisors (68621235522).

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

68618171838 is a wasteful number, since it uses less digits than its factorization.

68618171838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255311.

The product of its digits is 3096576, while the sum is 57.

The spelling of 68618171838 in words is "sixty-eight billion, six hundred eighteen million, one hundred seventy-one thousand, eight hundred thirty-eight".