648020104 has 8 divisors (see below), whose sum is σ = 1215037710. Its totient is φ = 324010048.

The previous prime is 648020057. The next prime is 648020123. The reversal of 648020104 is 401020846.

It can be written as a sum of positive squares in only one way, i.e., 595457604 + 52562500 = 24402^2 + 7250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40501249 + ... + 40501264.

Almost surely, 2^648020104 is an apocalyptic number.

It is an amenable number.

648020104 is a deficient number, since it is larger than the sum of its proper divisors (567017606).

648020104 is a wasteful number, since it uses less digits than its factorization.

648020104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81002519 (or 81002515 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 648020104 is about 25456.2389995066. The cubic root of 648020104 is about 865.3586911615.

The spelling of 648020104 in words is "six hundred forty-eight million, twenty thousand, one hundred four".