68488143840 has 120 divisors (see below), whose sum is σ = 241706120040. Its totient is φ = 18263501568.

The previous prime is 68488143839. The next prime is 68488143863. The reversal of 68488143840 is 4834188486.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (54).

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 19 ways as a sum of consecutive naturals, for example, 2629330 + ... + 2655249.

It is an arithmetic number, because the mean of its divisors is an integer number (2014217667).

Almost surely, 2^68488143840 is an apocalyptic number.

68488143840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68488143840 is an abundant number, since it is smaller than the sum of its proper divisors (173217976200).

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

68488143840 is a wasteful number, since it uses less digits than its factorization.

68488143840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5284606 (or 5284589 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 54.

The spelling of 68488143840 in words is "sixty-eight billion, four hundred eighty-eight million, one hundred forty-three thousand, eight hundred forty".