276042450821 has 2 divisors, whose sum is σ = 276042450822. Its totient is φ = 276042450820.

The previous prime is 276042450743. The next prime is 276042450833. The reversal of 276042450821 is 128054240672.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214197724225 + 61844726596 = 462815^2 + 248686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-276042450821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276042450121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138021225410 + 138021225411.

It is an arithmetic number, because the mean of its divisors is an integer number (138021225411).

Almost surely, 2^276042450821 is an apocalyptic number.

It is an amenable number.

276042450821 is a deficient number, since it is larger than the sum of its proper divisors (1).

276042450821 is an equidigital number, since it uses as much as digits as its factorization.

276042450821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 276042450821 in words is "two hundred seventy-six billion, forty-two million, four hundred fifty thousand, eight hundred twenty-one".