6425643167 has 2 divisors, whose sum is σ = 6425643168. Its totient is φ = 6425643166.

The previous prime is 6425643143. The next prime is 6425643181. The reversal of 6425643167 is 7613465246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6425643167 - 2¹² = 6425639071 is a prime.

It is a super-2 number, since 2×6425643167² = 82577780219227579778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6425643197) 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, 3212821583 + 3212821584.

It is an arithmetic number, because the mean of its divisors is an integer number (3212821584).

Almost surely, 2^6425643167 is an apocalyptic number.

6425643167 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425643167 is an equidigital number, since it uses as much as digits as its factorization.

6425643167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 44.

The square root of 6425643167 is about 80160.1095745259. The cubic root of 6425643167 is about 1859.1119172549. Note that the first 3 decimals are identical.

The spelling of 6425643167 in words is "six billion, four hundred twenty-five million, six hundred forty-three thousand, one hundred sixty-seven".