648135866 has 16 divisors (see below), whose sum is σ = 1169568960. Its totient is φ = 263152800.

The previous prime is 648135833. The next prime is 648135871. The reversal of 648135866 is 668531846.

It is a self number, because there is not a number n which added to its sum of digits gives 648135866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218035 + ... + 1218566.

It is an arithmetic number, because the mean of its divisors is an integer number (73098060).

Almost surely, 2^648135866 is an apocalyptic number.

648135866 is a deficient number, since it is larger than the sum of its proper divisors (521433094).

648135866 is a wasteful number, since it uses less digits than its factorization.

648135866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436629.

The product of its digits is 829440, while the sum is 47.

The square root of 648135866 is about 25458.5126431219. The cubic root of 648135866 is about 865.4102171803.

The spelling of 648135866 in words is "six hundred forty-eight million, one hundred thirty-five thousand, eight hundred sixty-six".