648664635 has 16 divisors (see below), whose sum is σ = 1047050784. Its totient is φ = 342892032.

The previous prime is 648664609. The next prime is 648664637. The reversal of 648664635 is 536466846.

It is not a de Polignac number, because 648664635 - 2⁷ = 648664507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648664637) 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 in 15 ways as a sum of consecutive naturals, for example, 189652 + ... + 193041.

It is an arithmetic number, because the mean of its divisors is an integer number (65440674).

Almost surely, 2^648664635 is an apocalyptic number.

648664635 is a deficient number, since it is larger than the sum of its proper divisors (398386149).

648664635 is a wasteful number, since it uses less digits than its factorization.

648664635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382814.

The product of its digits is 2488320, while the sum is 48.

The square root of 648664635 is about 25468.8954413025. The cubic root of 648664635 is about 865.6454958894.

The spelling of 648664635 in words is "six hundred forty-eight million, six hundred sixty-four thousand, six hundred thirty-five".