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109881791689 is a prime number
BaseRepresentation
bin110011001010101110…
…1110001010011001001
3101111121211222101001111
41212111131301103021
53300014214313224
6122251244050321
710636654550545
oct1462535612311
9344554871044
10109881791689
114266745249a
12193672339a1
13a491b7c667
145465612a25
152cd1a47d94
hex19957714c9

109881791689 has 2 divisors, whose sum is σ = 109881791690. Its totient is φ = 109881791688.

The previous prime is 109881791681. The next prime is 109881791711. The reversal of 109881791689 is 986197188901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71462655625 + 38419136064 = 267325^2 + 196008^2 .

It is an emirp because it is prime and its reverse (986197188901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109881791689 - 23 = 109881791681 is a prime.

It is not a weakly prime, because it can be changed into another prime (109881791681) by changing a digit.

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 as a sum of consecutive naturals, namely, 54940895844 + 54940895845.

It is an arithmetic number, because the mean of its divisors is an integer number (54940895845).

Almost surely, 2109881791689 is an apocalyptic number.

It is an amenable number.

109881791689 is a deficient number, since it is larger than the sum of its proper divisors (1).

109881791689 is an equidigital number, since it uses as much as digits as its factorization.

109881791689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 67.

The spelling of 109881791689 in words is "one hundred nine billion, eight hundred eighty-one million, seven hundred ninety-one thousand, six hundred eighty-nine".