280506680449 has 2 divisors, whose sum is σ = 280506680450. Its totient is φ = 280506680448.

The previous prime is 280506680401. The next prime is 280506680459. The reversal of 280506680449 is 944086605082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276195444849 + 4311235600 = 525543^2 + 65660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280506680449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 280506680396 and 280506680405.

It is not a weakly prime, because it can be changed into another prime (280506680459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140253340224 + 140253340225.

It is an arithmetic number, because the mean of its divisors is an integer number (140253340225).

Almost surely, 2^280506680449 is an apocalyptic number.

It is an amenable number.

280506680449 is a deficient number, since it is larger than the sum of its proper divisors (1).

280506680449 is an equidigital number, since it uses as much as digits as its factorization.

280506680449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 280506680449 in words is "two hundred eighty billion, five hundred six million, six hundred eighty thousand, four hundred forty-nine".