275302778021 has 2 divisors, whose sum is σ = 275302778022. Its totient is φ = 275302778020.

The previous prime is 275302777987. The next prime is 275302778027. The reversal of 275302778021 is 120877203572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273096127396 + 2206650625 = 522586^2 + 46975^2 .

It is a cyclic number.

It is not a de Polignac number, because 275302778021 - 2¹⁰ = 275302776997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275302778027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137651389010 + 137651389011.

It is an arithmetic number, because the mean of its divisors is an integer number (137651389011).

Almost surely, 2^275302778021 is an apocalyptic number.

It is an amenable number.

275302778021 is a deficient number, since it is larger than the sum of its proper divisors (1).

275302778021 is an equidigital number, since it uses as much as digits as its factorization.

275302778021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 329280, while the sum is 44.

The spelling of 275302778021 in words is "two hundred seventy-five billion, three hundred two million, seven hundred seventy-eight thousand, twenty-one".