820082621563 has 2 divisors, whose sum is σ = 820082621564. Its totient is φ = 820082621562.

The previous prime is 820082621489. The next prime is 820082621573. The reversal of 820082621563 is 365126280028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820082621563 - 2²⁹ = 819545750651 is a prime.

It is not a weakly prime, because it can be changed into another prime (820082621573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410041310781 + 410041310782.

It is an arithmetic number, because the mean of its divisors is an integer number (410041310782).

Almost surely, 2^820082621563 is an apocalyptic number.

820082621563 is a deficient number, since it is larger than the sum of its proper divisors (1).

820082621563 is an equidigital number, since it uses as much as digits as its factorization.

820082621563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 820082621563 in words is "eight hundred twenty billion, eighty-two million, six hundred twenty-one thousand, five hundred sixty-three".