648695305 has 8 divisors (see below), whose sum is σ = 803545344. Its totient is φ = 502215600.

The previous prime is 648695251. The next prime is 648695309. The reversal of 648695305 is 503596846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 648695305 - 2²¹ = 646598153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648695309) 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 7 ways as a sum of consecutive naturals, for example, 2092411 + ... + 2092720.

It is an arithmetic number, because the mean of its divisors is an integer number (100443168).

Almost surely, 2^648695305 is an apocalyptic number.

It is an amenable number.

648695305 is a deficient number, since it is larger than the sum of its proper divisors (154850039).

648695305 is a wasteful number, since it uses less digits than its factorization.

648695305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185167.

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 648695305 is about 25469.4975411766. The cubic root of 648695305 is about 865.6591387527.

The spelling of 648695305 in words is "six hundred forty-eight million, six hundred ninety-five thousand, three hundred five".