8217056155673 has 2 divisors, whose sum is σ = 8217056155674. Its totient is φ = 8217056155672.

The previous prime is 8217056155669. The next prime is 8217056155751. The reversal of 8217056155673 is 3765516507128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7368662262784 + 848393892889 = 2714528^2 + 921083^2 .

It is a cyclic number.

It is not a de Polignac number, because 8217056155673 - 2² = 8217056155669 is a prime.

It is a super-2 number, since 2×8217056155673² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8217056755673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4108528077836 + 4108528077837.

It is an arithmetic number, because the mean of its divisors is an integer number (4108528077837).

Almost surely, 2^{8217056155673} is an apocalyptic number.

It is an amenable number.

8217056155673 is a deficient number, since it is larger than the sum of its proper divisors (1).

8217056155673 is an equidigital number, since it uses as much as digits as its factorization.

8217056155673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 8217056155673 in words is "eight trillion, two hundred seventeen billion, fifty-six million, one hundred fifty-five thousand, six hundred seventy-three".