509448100648 has 8 divisors (see below), whose sum is σ = 955215188730. Its totient is φ = 254724050320.

The previous prime is 509448100633. The next prime is 509448100687. The reversal of 509448100648 is 846001844905.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 506741812164 + 2706288484 = 711858^2 + 52022^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31840506283 + ... + 31840506298.

Almost surely, 2^509448100648 is an apocalyptic number.

It is an amenable number.

509448100648 is a deficient number, since it is larger than the sum of its proper divisors (445767088082).

509448100648 is a wasteful number, since it uses less digits than its factorization.

509448100648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63681012587 (or 63681012583 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 509448100648 in words is "five hundred nine billion, four hundred forty-eight million, one hundred thousand, six hundred forty-eight".