648910105 has 4 divisors (see below), whose sum is σ = 778692132. Its totient is φ = 519128080.

The previous prime is 648910103. The next prime is 648910117. The reversal of 648910105 is 501019846.

648910105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501019846 = 2 ⋅250509923.

It can be written as a sum of positive squares in 2 ways, for example, as 404050201 + 244859904 = 20101^2 + 15648^2 .

It is not a de Polignac number, because 648910105 - 2¹ = 648910103 is a prime.

It is a super-2 number, since 2×648910105² = 842168648742222050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648910103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64891006 + ... + 64891015.

It is an arithmetic number, because the mean of its divisors is an integer number (194673033).

Almost surely, 2^648910105 is an apocalyptic number.

It is an amenable number.

648910105 is a deficient number, since it is larger than the sum of its proper divisors (129782027).

648910105 is a wasteful number, since it uses less digits than its factorization.

648910105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129782026.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 648910105 is about 25473.7140009069. The cubic root of 648910105 is about 865.7546756773.

The spelling of 648910105 in words is "six hundred forty-eight million, nine hundred ten thousand, one hundred five".