648728011 has 2 divisors, whose sum is σ = 648728012. Its totient is φ = 648728010.

The previous prime is 648728009. The next prime is 648728021. The reversal of 648728011 is 110827846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648728011 - 2¹ = 648728009 is a prime.

It is a super-2 number, since 2×648728011² = 841696064512032242, which contains 22 as substring.

Together with 648728009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (648728021) by changing a digit.

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 as a sum of consecutive naturals, namely, 324364005 + 324364006.

It is an arithmetic number, because the mean of its divisors is an integer number (324364006).

Almost surely, 2^648728011 is an apocalyptic number.

648728011 is a deficient number, since it is larger than the sum of its proper divisors (1).

648728011 is an equidigital number, since it uses as much as digits as its factorization.

648728011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 648728011 is about 25470.1395952201. The cubic root of 648728011 is about 865.6736868114.

The spelling of 648728011 in words is "six hundred forty-eight million, seven hundred twenty-eight thousand, eleven".