648642226 has 16 divisors (see below), whose sum is σ = 990214848. Its totient is φ = 318603600.

The previous prime is 648642223. The next prime is 648642257. The reversal of 648642226 is 622246846.

It is not an unprimeable number, because it can be changed into a prime (648642223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32116 + ... + 48256.

It is an arithmetic number, because the mean of its divisors is an integer number (61888428).

Almost surely, 2^648642226 is an apocalyptic number.

648642226 is a deficient number, since it is larger than the sum of its proper divisors (341572622).

648642226 is a wasteful number, since it uses less digits than its factorization.

648642226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16497.

The product of its digits is 221184, while the sum is 40.

The square root of 648642226 is about 25468.4555087269. The cubic root of 648642226 is about 865.6355274752.

The spelling of 648642226 in words is "six hundred forty-eight million, six hundred forty-two thousand, two hundred twenty-six".