646534227 has 16 divisors (see below), whose sum is σ = 888910848. Its totient is φ = 417786720.

The previous prime is 646534201. The next prime is 646534241. The reversal of 646534227 is 722435646.

It is not a de Polignac number, because 646534227 - 2⁸ = 646533971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646534277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11299 + ... + 37692.

It is an arithmetic number, because the mean of its divisors is an integer number (55556928).

Almost surely, 2^646534227 is an apocalyptic number.

646534227 is a deficient number, since it is larger than the sum of its proper divisors (242376621).

646534227 is a wasteful number, since it uses less digits than its factorization.

646534227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49130.

The product of its digits is 241920, while the sum is 39.

The square root of 646534227 is about 25427.0373225038. The cubic root of 646534227 is about 864.6967772319.

The spelling of 646534227 in words is "six hundred forty-six million, five hundred thirty-four thousand, two hundred twenty-seven".