648242845 has 16 divisors (see below), whose sum is σ = 798367680. Its totient is φ = 505016064.

The previous prime is 648242839. The next prime is 648242863. The reversal of 648242845 is 548242846.

It is a cyclic number.

It is not a de Polignac number, because 648242845 - 2¹¹ = 648240797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70261 + ... + 78949.

It is an arithmetic number, because the mean of its divisors is an integer number (49897980).

Almost surely, 2^648242845 is an apocalyptic number.

It is an amenable number.

648242845 is a deficient number, since it is larger than the sum of its proper divisors (150124835).

648242845 is a wasteful number, since it uses less digits than its factorization.

648242845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9084.

The product of its digits is 491520, while the sum is 43.

The square root of 648242845 is about 25460.6136021896. The cubic root of 648242845 is about 865.4578284047.

Subtracting from 648242845 its reverse (548242846), we obtain a palindrome (99999999).

The spelling of 648242845 in words is "six hundred forty-eight million, two hundred forty-two thousand, eight hundred forty-five".