564778216834903 has 2 divisors, whose sum is σ = 564778216834904. Its totient is φ = 564778216834902.

The previous prime is 564778216834829. The next prime is 564778216834973. The reversal of 564778216834903 is 309438612877465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 564778216834903 - 2²⁵ = 564778183280471 is a prime.

It is a super-2 number, since 2×564778216834903² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564778216834973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282389108417451 + 282389108417452.

It is an arithmetic number, because the mean of its divisors is an integer number (282389108417452).

It is a 1-persistent number, because it is pandigital, but 2⋅564778216834903 = 1129556433669806 is not.

Almost surely, 2^{564778216834903} is an apocalyptic number.

564778216834903 is a deficient number, since it is larger than the sum of its proper divisors (1).

564778216834903 is an equidigital number, since it uses as much as digits as its factorization.

564778216834903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1463132160, while the sum is 73.

The spelling of 564778216834903 in words is "five hundred sixty-four trillion, seven hundred seventy-eight billion, two hundred sixteen million, eight hundred thirty-four thousand, nine hundred three".