280819985969 has 2 divisors, whose sum is σ = 280819985970. Its totient is φ = 280819985968.

The previous prime is 280819985933. The next prime is 280819985977. The reversal of 280819985969 is 969589918082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241729555600 + 39090430369 = 491660^2 + 197713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280819985969 is a prime.

It is a super-2 number, since 2×280819985969² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 280819985896 and 280819985905.

It is not a weakly prime, because it can be changed into another prime (280819985569) 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, 140409992984 + 140409992985.

It is an arithmetic number, because the mean of its divisors is an integer number (140409992985).

Almost surely, 2^280819985969 is an apocalyptic number.

It is an amenable number.

280819985969 is a deficient number, since it is larger than the sum of its proper divisors (1).

280819985969 is an equidigital number, since it uses as much as digits as its factorization.

280819985969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201553920, while the sum is 74.

The spelling of 280819985969 in words is "two hundred eighty billion, eight hundred nineteen million, nine hundred eighty-five thousand, nine hundred sixty-nine".