763564544360021 has 2 divisors, whose sum is σ = 763564544360022. Its totient is φ = 763564544360020.

The previous prime is 763564544360011. The next prime is 763564544360027. The reversal of 763564544360021 is 120063445465367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 763559753782225 + 4790577796 = 27632585^2 + 69214^2 .

It is a cyclic number.

It is not a de Polignac number, because 763564544360021 - 2⁴² = 759166497848917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (763564544360027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381782272180010 + 381782272180011.

It is an arithmetic number, because the mean of its divisors is an integer number (381782272180011).

Almost surely, 2^{763564544360021} is an apocalyptic number.

It is an amenable number.

763564544360021 is a deficient number, since it is larger than the sum of its proper divisors (1).

763564544360021 is an equidigital number, since it uses as much as digits as its factorization.

763564544360021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43545600, while the sum is 56.

The spelling of 763564544360021 in words is "seven hundred sixty-three trillion, five hundred sixty-four billion, five hundred forty-four million, three hundred sixty thousand, twenty-one".