281643454039 has 2 divisors, whose sum is σ = 281643454040. Its totient is φ = 281643454038.

The previous prime is 281643454033. The next prime is 281643454063. The reversal of 281643454039 is 930454346182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281643454039 - 2⁵ = 281643454007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281643453983 and 281643454001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281643454033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140821727019 + 140821727020.

It is an arithmetic number, because the mean of its divisors is an integer number (140821727020).

Almost surely, 2^281643454039 is an apocalyptic number.

281643454039 is a deficient number, since it is larger than the sum of its proper divisors (1).

281643454039 is an equidigital number, since it uses as much as digits as its factorization.

281643454039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 281643454039 in words is "two hundred eighty-one billion, six hundred forty-three million, four hundred fifty-four thousand, thirty-nine".