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68510177568 = 2533731365411
BaseRepresentation
bin111111110011100001…
…100101100100100000
320112211120222121201000
4333303201211210200
52110302101140233
651250110512000
74643513621010
oct776341454440
9215746877630
1068510177568
1127067233468
121133bb05600
1365ca8a9a11
14345cc01c40
151bae926d13
hexff3865920

68510177568 has 192 divisors, whose sum is σ = 235734589440. Its totient is φ = 18942854400.

The previous prime is 68510177557. The next prime is 68510177569. The reversal of 68510177568 is 86577101586.

68510177568 is a `hidden beast` number, since 6 + 8 + 5 + 1 + 0 + 1 + 77 + 568 = 666.

68510177568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (68510177569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4783 + ... + 370193.

It is an arithmetic number, because the mean of its divisors is an integer number (1227784320).

Almost surely, 268510177568 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 68510177568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117867294720).

68510177568 is an abundant number, since it is smaller than the sum of its proper divisors (167224411872).

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

68510177568 is a wasteful number, since it uses less digits than its factorization.

68510177568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365468 (or 365454 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 68510177568 in words is "sixty-eight billion, five hundred ten million, one hundred seventy-seven thousand, five hundred sixty-eight".