8220943925671 has 2 divisors, whose sum is σ = 8220943925672. Its totient is φ = 8220943925670.

The previous prime is 8220943925659. The next prime is 8220943925707. The reversal of 8220943925671 is 1765293490228.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8220943925671 - 2⁷ = 8220943925543 is a prime.

It is a super-4 number, since 4×8220943925671⁴ (a number of 53 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8220943925071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110471962835 + 4110471962836.

It is an arithmetic number, because the mean of its divisors is an integer number (4110471962836).

It is a 1-persistent number, because it is pandigital, but 2⋅8220943925671 = 16441887851342 is not.

Almost surely, 2^{8220943925671} is an apocalyptic number.

8220943925671 is a deficient number, since it is larger than the sum of its proper divisors (1).

8220943925671 is an equidigital number, since it uses as much as digits as its factorization.

8220943925671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 8220943925671 in words is "eight trillion, two hundred twenty billion, nine hundred forty-three million, nine hundred twenty-five thousand, six hundred seventy-one".