68171757678918 has 32 divisors (see below), whose sum is σ = 151809063782400. Its totient is φ = 22676478885288.

The previous prime is 68171757678889. The next prime is 68171757678949. The reversal of 68171757678918 is 81987675717186.

68171757678918 is a `hidden beast` number, since 6 + 8 + 17 + 17 + 576 + 7 + 8 + 9 + 18 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317761146 + ... + 1317812877.

It is an arithmetic number, because the mean of its divisors is an integer number (4744033243200).

Almost surely, 2^{68171757678918} is an apocalyptic number.

68171757678918 is an abundant number, since it is smaller than the sum of its proper divisors (83637306103482).

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

68171757678918 is a wasteful number, since it uses less digits than its factorization.

68171757678918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635574513 (or 2635574507 counting only the distinct ones).

The product of its digits is 1991485440, while the sum is 81.

The spelling of 68171757678918 in words is "sixty-eight trillion, one hundred seventy-one billion, seven hundred fifty-seven million, six hundred seventy-eight thousand, nine hundred eighteen".