281639046133873 has 2 divisors, whose sum is σ = 281639046133874. Its totient is φ = 281639046133872.

The previous prime is 281639046133817. The next prime is 281639046133877. The reversal of 281639046133873 is 378331640936182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176297396956209 + 105341649177664 = 13277703^2 + 10263608^2 .

It is a cyclic number.

It is not a de Polignac number, because 281639046133873 - 2¹⁷ = 281639046002801 is a prime.

It is not a weakly prime, because it can be changed into another prime (281639046133877) 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, 140819523066936 + 140819523066937.

It is an arithmetic number, because the mean of its divisors is an integer number (140819523066937).

Almost surely, 2^{281639046133873} is an apocalyptic number.

It is an amenable number.

281639046133873 is a deficient number, since it is larger than the sum of its proper divisors (1).

281639046133873 is an equidigital number, since it uses as much as digits as its factorization.

281639046133873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94058496, while the sum is 64.

The spelling of 281639046133873 in words is "two hundred eighty-one trillion, six hundred thirty-nine billion, forty-six million, one hundred thirty-three thousand, eight hundred seventy-three".