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68787532799 = 661376927611
BaseRepresentation
bin100000000010000001…
…1100111001111111111
320120112220212201112222
41000010003213033333
52111334102022144
651333415315555
74653422244566
oct1000403471777
9216486781488
1068787532799
1127199850567
12113b897bbbb
1366431a963b
14348799cbdd
151bc8e612ee
hex10040e73ff

68787532799 has 8 divisors (see below), whose sum is σ = 68912372880. Its totient is φ = 68662756800.

The previous prime is 68787532787. The next prime is 68787532829. The reversal of 68787532799 is 99723578786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68787532799 - 28 = 68787532543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68787532399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2477504 + ... + 2505114.

It is an arithmetic number, because the mean of its divisors is an integer number (8614046610).

Almost surely, 268787532799 is an apocalyptic number.

68787532799 is a deficient number, since it is larger than the sum of its proper divisors (124840081).

68787532799 is a wasteful number, since it uses less digits than its factorization.

68787532799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32041.

The product of its digits is 320060160, while the sum is 71.

The spelling of 68787532799 in words is "sixty-eight billion, seven hundred eighty-seven million, five hundred thirty-two thousand, seven hundred ninety-nine".

Divisors: 1 661 3769 27611 2491309 18250871 104065859 68787532799