68239571636880 has 720 divisors, whose sum is σ = 274045729486464. Its totient is φ = 15167234396160.

The previous prime is 68239571636839. The next prime is 68239571636969. The reversal of 68239571636880 is 8863617593286.

It is a happy number.

68239571636880 is a `hidden beast` number, since 68 + 2 + 395 + 71 + 6 + 36 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a super-2 number, since 2×68239571636880² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 68239571636799 and 68239571636808.

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 143 ways as a sum of consecutive naturals, for example, 182669647 + ... + 183042833.

Almost surely, 2^{68239571636880} is an apocalyptic number.

68239571636880 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 68239571636880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137022864743232).

68239571636880 is an abundant number, since it is smaller than the sum of its proper divisors (205806157849584).

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

68239571636880 is a wasteful number, since it uses less digits than its factorization.

68239571636880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373364 (or 373348 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 72.

The spelling of 68239571636880 in words is "sixty-eight trillion, two hundred thirty-nine billion, five hundred seventy-one million, six hundred thirty-six thousand, eight hundred eighty".