221534413660463 has 2 divisors, whose sum is σ = 221534413660464. Its totient is φ = 221534413660462.

The previous prime is 221534413660421. The next prime is 221534413660481. The reversal of 221534413660463 is 364066314435122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221534413660463 - 2²² = 221534409466159 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221534413669463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110767206830231 + 110767206830232.

It is an arithmetic number, because the mean of its divisors is an integer number (110767206830232).

Almost surely, 2^{221534413660463} is an apocalyptic number.

221534413660463 is a deficient number, since it is larger than the sum of its proper divisors (1).

221534413660463 is an equidigital number, since it uses as much as digits as its factorization.

221534413660463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 50.

The spelling of 221534413660463 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred thirteen million, six hundred sixty thousand, four hundred sixty-three".