648677018 has 16 divisors (see below), whose sum is σ = 1062059040. Its totient is φ = 294690000.

The previous prime is 648677009. The next prime is 648677083. The reversal of 648677018 is 810776846.

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 7 ways as a sum of consecutive naturals, for example, 38393 + ... + 52643.

It is an arithmetic number, because the mean of its divisors is an integer number (66378690).

Almost surely, 2^648677018 is an apocalyptic number.

648677018 is a deficient number, since it is larger than the sum of its proper divisors (413382022).

648677018 is a wasteful number, since it uses less digits than its factorization.

648677018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16333.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 648677018 is about 25469.1385405946. The cubic root of 648677018 is about 865.6510042417.

The spelling of 648677018 in words is "six hundred forty-eight million, six hundred seventy-seven thousand, eighteen".