646560127 has 2 divisors, whose sum is σ = 646560128. Its totient is φ = 646560126.

The previous prime is 646560121. The next prime is 646560181. The reversal of 646560127 is 721065646.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646560127 - 2¹¹ = 646558079 is a prime.

It is a super-2 number, since 2×646560127² = 836079995652512258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646560121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323280063 + 323280064.

It is an arithmetic number, because the mean of its divisors is an integer number (323280064).

Almost surely, 2^646560127 is an apocalyptic number.

646560127 is a deficient number, since it is larger than the sum of its proper divisors (1).

646560127 is an equidigital number, since it uses as much as digits as its factorization.

646560127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 646560127 is about 25427.5466177923. The cubic root of 646560127 is about 864.7083235902.

The spelling of 646560127 in words is "six hundred forty-six million, five hundred sixty thousand, one hundred twenty-seven".