648149505 has 32 divisors (see below), whose sum is σ = 1061337600. Its totient is φ = 337612032.

The previous prime is 648149501. The next prime is 648149521. The reversal of 648149505 is 505941846.

648149505 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648149505 - 2² = 648149501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648149501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 583891 + ... + 584999.

It is an arithmetic number, because the mean of its divisors is an integer number (33166800).

Almost surely, 2^648149505 is an apocalyptic number.

It is an amenable number.

648149505 is a deficient number, since it is larger than the sum of its proper divisors (413188095).

648149505 is a wasteful number, since it uses less digits than its factorization.

648149505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 648149505 is about 25458.7805088932. The cubic root of 648149505 is about 865.4162875367.

The spelling of 648149505 in words is "six hundred forty-eight million, one hundred forty-nine thousand, five hundred five".