68517643800 has 192 divisors, whose sum is σ = 215992425600. Its totient is φ = 17963827200.

The previous prime is 68517643757. The next prime is 68517643837. The reversal of 68517643800 is 834671586.

It is a self number, because there is not a number n which added to its sum of digits gives 68517643800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25766871 + ... + 25769529.

It is an arithmetic number, because the mean of its divisors is an integer number (1124960550).

Almost surely, 2^68517643800 is an apocalyptic number.

68517643800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68517643800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107996212800).

68517643800 is an abundant number, since it is smaller than the sum of its proper divisors (147474781800).

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

68517643800 is a wasteful number, since it uses less digits than its factorization.

68517643800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386 (or 3377 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 68517643800 in words is "sixty-eight billion, five hundred seventeen million, six hundred forty-three thousand, eight hundred".