280126438561 has 2 divisors, whose sum is σ = 280126438562. Its totient is φ = 280126438560.

The previous prime is 280126438547. The next prime is 280126438597. The reversal of 280126438561 is 165834621082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157643937936 + 122482500625 = 397044^2 + 349975^2 .

It is a cyclic number.

It is not a de Polignac number, because 280126438561 - 2⁷ = 280126438433 is a prime.

It is not a weakly prime, because it can be changed into another prime (280126438531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140063219280 + 140063219281.

It is an arithmetic number, because the mean of its divisors is an integer number (140063219281).

Almost surely, 2^280126438561 is an apocalyptic number.

It is an amenable number.

280126438561 is a deficient number, since it is larger than the sum of its proper divisors (1).

280126438561 is an equidigital number, since it uses as much as digits as its factorization.

280126438561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 280126438561 in words is "two hundred eighty billion, one hundred twenty-six million, four hundred thirty-eight thousand, five hundred sixty-one".