276568621129 has 2 divisors, whose sum is σ = 276568621130. Its totient is φ = 276568621128.

The previous prime is 276568621127. The next prime is 276568621151. The reversal of 276568621129 is 921126865672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273105534025 + 3463087104 = 522595^2 + 58848^2 .

It is a cyclic number.

It is not a de Polignac number, because 276568621129 - 2¹ = 276568621127 is a prime.

Together with 276568621127, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 276568621129.

It is not a weakly prime, because it can be changed into another prime (276568621127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138284310564 + 138284310565.

It is an arithmetic number, because the mean of its divisors is an integer number (138284310565).

Almost surely, 2^276568621129 is an apocalyptic number.

It is an amenable number.

276568621129 is a deficient number, since it is larger than the sum of its proper divisors (1).

276568621129 is an equidigital number, since it uses as much as digits as its factorization.

276568621129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The spelling of 276568621129 in words is "two hundred seventy-six billion, five hundred sixty-eight million, six hundred twenty-one thousand, one hundred twenty-nine".