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81369877612883 is a prime number
BaseRepresentation
bin10010100000000101100110…
…101001101000100101010011
3101200002212212200021000011112
4102200011212221220211103
541131131002132103013
6445020450012003535
723065531264525646
oct2240054651504523
9350085780230145
1081369877612883
1123a21853671122
12916203b4605ab
1336531b9c22692
1416144747b7a5d
1596193d346ba8
hex4a0166a68953

81369877612883 has 2 divisors, whose sum is σ = 81369877612884. Its totient is φ = 81369877612882.

The previous prime is 81369877612787. The next prime is 81369877612913. The reversal of 81369877612883 is 38821677896318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81369877612883 - 226 = 81369810504019 is a prime.

It is not a weakly prime, because it can be changed into another prime (81369879612883) 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, 40684938806441 + 40684938806442.

It is an arithmetic number, because the mean of its divisors is an integer number (40684938806442).

Almost surely, 281369877612883 is an apocalyptic number.

81369877612883 is a deficient number, since it is larger than the sum of its proper divisors (1).

81369877612883 is an equidigital number, since it uses as much as digits as its factorization.

81369877612883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1170505728, while the sum is 77.

The spelling of 81369877612883 in words is "eighty-one trillion, three hundred sixty-nine billion, eight hundred seventy-seven million, six hundred twelve thousand, eight hundred eighty-three".