68361966840 has 64 divisors (see below), whose sum is σ = 205104130560. Its totient is φ = 18228237440.

The previous prime is 68361966811. The next prime is 68361966863. The reversal of 68361966840 is 4866916386.

It is a happy 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, 2007637 + ... + 2041403.

It is an arithmetic number, because the mean of its divisors is an integer number (3204752040).

Almost surely, 2^68361966840 is an apocalyptic number.

68361966840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68361966840 is an abundant number, since it is smaller than the sum of its proper divisors (136742163720).

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

68361966840 is a wasteful number, since it uses less digits than its factorization.

68361966840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50652 (or 50648 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 68361966840 in words is "sixty-eight billion, three hundred sixty-one million, nine hundred sixty-six thousand, eight hundred forty".