2780826281 has 2 divisors, whose sum is σ = 2780826282. Its totient is φ = 2780826280.

The previous prime is 2780826259. The next prime is 2780826319. The reversal of 2780826281 is 1826280872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1813056400 + 967769881 = 42580^2 + 31109^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780826281 - 2¹⁴ = 2780809897 is a prime.

It is a super-2 number, since 2×2780826281² = 15465989610200581922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2780826241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390413140 + 1390413141.

It is an arithmetic number, because the mean of its divisors is an integer number (1390413141).

Almost surely, 2^2780826281 is an apocalyptic number.

It is an amenable number.

2780826281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780826281 is an equidigital number, since it uses as much as digits as its factorization.

2780826281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 2780826281 is about 52733.5403799138. The cubic root of 2780826281 is about 1406.2351622704.

The spelling of 2780826281 in words is "two billion, seven hundred eighty million, eight hundred twenty-six thousand, two hundred eighty-one".