6563156940889 has 2 divisors, whose sum is σ = 6563156940890. Its totient is φ = 6563156940888.

The previous prime is 6563156940877. The next prime is 6563156940943. The reversal of 6563156940889 is 9880496513656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3316915137600 + 3246241803289 = 1821240^2 + 1801733^2 .

It is a cyclic number.

It is not a de Polignac number, because 6563156940889 - 2¹⁷ = 6563156809817 is a prime.

It is a super-2 number, since 2×6563156940889² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6563156940859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3281578470444 + 3281578470445.

It is an arithmetic number, because the mean of its divisors is an integer number (3281578470445).

Almost surely, 2^{6563156940889} is an apocalyptic number.

It is an amenable number.

6563156940889 is a deficient number, since it is larger than the sum of its proper divisors (1).

6563156940889 is an equidigital number, since it uses as much as digits as its factorization.

6563156940889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 335923200, while the sum is 70.

The spelling of 6563156940889 in words is "six trillion, five hundred sixty-three billion, one hundred fifty-six million, nine hundred forty thousand, eight hundred eighty-nine".