646550027 has 2 divisors, whose sum is σ = 646550028. Its totient is φ = 646550026.

The previous prime is 646549979. The next prime is 646550057. The reversal of 646550027 is 720055646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646550027 - 2¹⁰ = 646549003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (646550057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323275013 + 323275014.

It is an arithmetic number, because the mean of its divisors is an integer number (323275014).

Almost surely, 2^646550027 is an apocalyptic number.

646550027 is a deficient number, since it is larger than the sum of its proper divisors (1).

646550027 is an equidigital number, since it uses as much as digits as its factorization.

646550027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 646550027 is about 25427.3480135070. The cubic root of 646550027 is about 864.7038209930.

The spelling of 646550027 in words is "six hundred forty-six million, five hundred fifty thousand, twenty-seven".