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11261908559981 is a prime number
BaseRepresentation
bin1010001111100001111000…
…0011110010100001101101
31110212121221202211001122202
42203320132003302201231
52434003342042404411
635541352132551245
72241434410206002
oct243703603624155
943777852731582
1011261908559981
11365216a86a572
12131a772482525
13638cbb710231
142ad1177a18a9
15147e34bd083b
hexa3e1e0f286d

11261908559981 has 2 divisors, whose sum is σ = 11261908559982. Its totient is φ = 11261908559980.

The previous prime is 11261908559971. The next prime is 11261908560017. The reversal of 11261908559981 is 18995580916211.

11261908559981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10378996506025 + 882912053956 = 3221645^2 + 939634^2 .

It is a cyclic number.

It is not a de Polignac number, because 11261908559981 - 238 = 10987030653037 is a prime.

It is a super-3 number, since 3×112619085599813 (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11261908559971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5630954279990 + 5630954279991.

It is an arithmetic number, because the mean of its divisors is an integer number (5630954279991).

Almost surely, 211261908559981 is an apocalyptic number.

It is an amenable number.

11261908559981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11261908559981 is an equidigital number, since it uses as much as digits as its factorization.

11261908559981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13996800, while the sum is 65.

The spelling of 11261908559981 in words is "eleven trillion, two hundred sixty-one billion, nine hundred eight million, five hundred fifty-nine thousand, nine hundred eighty-one".