646555150 has 12 divisors (see below), whose sum is σ = 1202592672. Its totient is φ = 258622040.

The previous prime is 646555081. The next prime is 646555163. The reversal of 646555150 is 51555646.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6465502 + ... + 6465601.

It is an arithmetic number, because the mean of its divisors is an integer number (100216056).

Almost surely, 2^646555150 is an apocalyptic number.

646555150 is a deficient number, since it is larger than the sum of its proper divisors (556037522).

646555150 is a wasteful number, since it uses less digits than its factorization.

646555150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12931115 (or 12931110 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 646555150 is about 25427.4487513002. The cubic root of 646555150 is about 864.7061048410.

The spelling of 646555150 in words is "six hundred forty-six million, five hundred fifty-five thousand, one hundred fifty".