276621105281 has 2 divisors, whose sum is σ = 276621105282. Its totient is φ = 276621105280.

The previous prime is 276621105247. The next prime is 276621105329. The reversal of 276621105281 is 182501126672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276587639056 + 33466225 = 525916^2 + 5785^2 .

It is a cyclic number.

It is not a de Polignac number, because 276621105281 - 2¹⁸ = 276620843137 is a prime.

It is a super-2 number, since 2×276621105281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (276621104281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138310552640 + 138310552641.

It is an arithmetic number, because the mean of its divisors is an integer number (138310552641).

Almost surely, 2^276621105281 is an apocalyptic number.

It is an amenable number.

276621105281 is a deficient number, since it is larger than the sum of its proper divisors (1).

276621105281 is an equidigital number, since it uses as much as digits as its factorization.

276621105281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 276621105281 in words is "two hundred seventy-six billion, six hundred twenty-one million, one hundred five thousand, two hundred eighty-one".