646551122 has 16 divisors (see below), whose sum is σ = 1109331072. Its totient is φ = 276853920.

The previous prime is 646551121. The next prime is 646551149. The reversal of 646551122 is 221155646.

It is not an unprimeable number, because it can be changed into a prime (646551121) 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 7 ways as a sum of consecutive naturals, for example, 2654 + ... + 36057.

It is an arithmetic number, because the mean of its divisors is an integer number (69333192).

Almost surely, 2^646551122 is an apocalyptic number.

646551122 is a deficient number, since it is larger than the sum of its proper divisors (462779950).

646551122 is a wasteful number, since it uses less digits than its factorization.

646551122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39913.

The product of its digits is 14400, while the sum is 32.

The square root of 646551122 is about 25427.3695454327. The cubic root of 646551122 is about 864.7043091481.

The spelling of 646551122 in words is "six hundred forty-six million, five hundred fifty-one thousand, one hundred twenty-two".