648727811 has 16 divisors (see below), whose sum is σ = 718233600. Its totient is φ = 583184448.

The previous prime is 648727801. The next prime is 648727829. The reversal of 648727811 is 118727846.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648727811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648727801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49655 + ... + 61343.

It is an arithmetic number, because the mean of its divisors is an integer number (44889600).

Almost surely, 2^648727811 is an apocalyptic number.

648727811 is a deficient number, since it is larger than the sum of its proper divisors (69505789).

648727811 is a wasteful number, since it uses less digits than its factorization.

648727811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11858.

The product of its digits is 150528, while the sum is 44.

The square root of 648727811 is about 25470.1356690537. The cubic root of 648727811 is about 865.6735978502.

The spelling of 648727811 in words is "six hundred forty-eight million, seven hundred twenty-seven thousand, eight hundred eleven".