648028398766 has 32 divisors (see below), whose sum is σ = 1165399073280. Its totient is φ = 264372914400.

The previous prime is 648028398749. The next prime is 648028398781. The reversal of 648028398766 is 667893820846.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11211520 + ... + 11269171.

It is an arithmetic number, because the mean of its divisors is an integer number (36418721040).

Almost surely, 2^648028398766 is an apocalyptic number.

648028398766 is a deficient number, since it is larger than the sum of its proper divisors (517370674514).

648028398766 is a wasteful number, since it uses less digits than its factorization.

648028398766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22480800.

The product of its (nonzero) digits is 167215104, while the sum is 67.

The spelling of 648028398766 in words is "six hundred forty-eight billion, twenty-eight million, three hundred ninety-eight thousand, seven hundred sixty-six".