68551123680 has 432 divisors, whose sum is σ = 267637353984. Its totient is φ = 15880273920.

The previous prime is 68551123673. The next prime is 68551123691. The reversal of 68551123680 is 8632115586.

68551123680 is a `hidden beast` number, since 6 + 8 + 551 + 12 + 3 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5403745 + ... + 5416415.

It is an arithmetic number, because the mean of its divisors is an integer number (619530912).

Almost surely, 2^68551123680 is an apocalyptic number.

68551123680 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 68551123680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133818676992).

68551123680 is an abundant number, since it is smaller than the sum of its proper divisors (199086230304).

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

68551123680 is a wasteful number, since it uses less digits than its factorization.

68551123680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12739 (or 12711 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 68551123680 in words is "sixty-eight billion, five hundred fifty-one million, one hundred twenty-three thousand, six hundred eighty".