276553544263649 has 2 divisors, whose sum is σ = 276553544263650. Its totient is φ = 276553544263648.

The previous prime is 276553544263583. The next prime is 276553544263669. The reversal of 276553544263649 is 946362445355672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261331311405025 + 15222232858624 = 16165745^2 + 3901568^2 .

It is a cyclic number.

It is not a de Polignac number, because 276553544263649 - 2²⁰ = 276553543215073 is a prime.

It is not a weakly prime, because it can be changed into another prime (276553544263669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138276772131824 + 138276772131825.

It is an arithmetic number, because the mean of its divisors is an integer number (138276772131825).

Almost surely, 2^{276553544263649} is an apocalyptic number.

It is an amenable number.

276553544263649 is a deficient number, since it is larger than the sum of its proper divisors (1).

276553544263649 is an equidigital number, since it uses as much as digits as its factorization.

276553544263649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104000, while the sum is 71.

The spelling of 276553544263649 in words is "two hundred seventy-six trillion, five hundred fifty-three billion, five hundred forty-four million, two hundred sixty-three thousand, six hundred forty-nine".