68418478140 has 48 divisors (see below), whose sum is σ = 193329296160. Its totient is φ = 18077541120.

The previous prime is 68418478081. The next prime is 68418478207. The reversal of 68418478140 is 4187481486.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5224231 + ... + 5237310.

It is an arithmetic number, because the mean of its divisors is an integer number (4027693670).

Almost surely, 2^68418478140 is an apocalyptic number.

68418478140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68418478140 is an abundant number, since it is smaller than the sum of its proper divisors (124910818020).

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

68418478140 is a wasteful number, since it uses less digits than its factorization.

68418478140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10461662 (or 10461660 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 51.

The spelling of 68418478140 in words is "sixty-eight billion, four hundred eighteen million, four hundred seventy-eight thousand, one hundred forty".