280820350513 has 2 divisors, whose sum is σ = 280820350514. Its totient is φ = 280820350512.

The previous prime is 280820350501. The next prime is 280820350543. The reversal of 280820350513 is 315053028082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254033136289 + 26787214224 = 504017^2 + 163668^2 .

It is a cyclic number.

It is not a de Polignac number, because 280820350513 - 2⁹ = 280820350001 is a prime.

It is not a weakly prime, because it can be changed into another prime (280820350543) 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, 140410175256 + 140410175257.

It is an arithmetic number, because the mean of its divisors is an integer number (140410175257).

Almost surely, 2^280820350513 is an apocalyptic number.

It is an amenable number.

280820350513 is a deficient number, since it is larger than the sum of its proper divisors (1).

280820350513 is an equidigital number, since it uses as much as digits as its factorization.

280820350513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 280820350513 its reverse (315053028082), we get a palindrome (595873378595).

The spelling of 280820350513 in words is "two hundred eighty billion, eight hundred twenty million, three hundred fifty thousand, five hundred thirteen".