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68957886080 = 27517232391153
BaseRepresentation
bin100000000111000110…
…1011101011010000000
320120222210102120022202
41000032031131122000
52112211204323310
651402342452332
74660561234436
oct1001615353200
9216883376282
1068957886080
1127276a244a6
1211445a340a8
13666c5836b5
1434a2464d56
151bd8db13a5
hex100e35d680

68957886080 has 256 divisors, whose sum is σ = 183059481600. Its totient is φ = 24706547712.

The previous prime is 68957886077. The next prime is 68957886157. The reversal of 68957886080 is 8068875986.

It is a junction number, because it is equal to n+sod(n) for n = 68957885998 and 68957886016.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59806784 + ... + 59807936.

It is an arithmetic number, because the mean of its divisors is an integer number (715076100).

Almost surely, 268957886080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68957886080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91529740800).

68957886080 is an abundant number, since it is smaller than the sum of its proper divisors (114101595520).

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

68957886080 is a wasteful number, since it uses less digits than its factorization.

68957886080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451 (or 1439 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 65.

The spelling of 68957886080 in words is "sixty-eight billion, nine hundred fifty-seven million, eight hundred eighty-six thousand, eighty".