648787845 has 16 divisors (see below), whose sum is σ = 1043500032. Its totient is φ = 344207040.

The previous prime is 648787837. The next prime is 648787877. The reversal of 648787845 is 548787846.

It is a happy number.

It is not a de Polignac number, because 648787845 - 2³ = 648787837 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 110362 + ... + 116091.

It is an arithmetic number, because the mean of its divisors is an integer number (65218752).

Almost surely, 2^648787845 is an apocalyptic number.

It is an amenable number.

648787845 is a deficient number, since it is larger than the sum of its proper divisors (394712187).

648787845 is a wasteful number, since it uses less digits than its factorization.

648787845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226652.

The product of its digits is 12042240, while the sum is 57.

The square root of 648787845 is about 25471.3141592655. The cubic root of 648787845 is about 865.7003004954.

Subtracting from 648787845 its reverse (548787846), we obtain a palindrome (99999999).

The spelling of 648787845 in words is "six hundred forty-eight million, seven hundred eighty-seven thousand, eight hundred forty-five".