280753680734561 has 2 divisors, whose sum is σ = 280753680734562. Its totient is φ = 280753680734560.

The previous prime is 280753680734507. The next prime is 280753680734629. The reversal of 280753680734561 is 165437086357082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269166056250961 + 11587624483600 = 16406281^2 + 3404060^2 .

It is a cyclic number.

It is not a de Polignac number, because 280753680734561 - 2²² = 280753676540257 is a prime.

It is not a weakly prime, because it can be changed into another prime (280753680734161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140376840367280 + 140376840367281.

It is an arithmetic number, because the mean of its divisors is an integer number (140376840367281).

Almost surely, 2^{280753680734561} is an apocalyptic number.

It is an amenable number.

280753680734561 is a deficient number, since it is larger than the sum of its proper divisors (1).

280753680734561 is an equidigital number, since it uses as much as digits as its factorization.

280753680734561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 203212800, while the sum is 65.

The spelling of 280753680734561 in words is "two hundred eighty trillion, seven hundred fifty-three billion, six hundred eighty million, seven hundred thirty-four thousand, five hundred sixty-one".