68178178542 has 32 divisors (see below), whose sum is σ = 141618539520. Its totient is φ = 21858024960.

The previous prime is 68178178483. The next prime is 68178178561. The reversal of 68178178542 is 24587187186.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 1094067 + ... + 1154702.

It is an arithmetic number, because the mean of its divisors is an integer number (4425579360).

Almost surely, 2^68178178542 is an apocalyptic number.

68178178542 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

68178178542 is an abundant number, since it is smaller than the sum of its proper divisors (73440360978).

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

68178178542 is a wasteful number, since it uses less digits than its factorization.

68178178542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248968.

The product of its digits is 6021120, while the sum is 57.

The spelling of 68178178542 in words is "sixty-eight billion, one hundred seventy-eight million, one hundred seventy-eight thousand, five hundred forty-two".