648168842 has 16 divisors (see below), whose sum is σ = 1038121920. Its totient is φ = 302783712.

The previous prime is 648168839. The next prime is 648168847. The reversal of 648168842 is 248861846.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (648168847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161867 + ... + 165822.

It is an arithmetic number, because the mean of its divisors is an integer number (64882620).

Almost surely, 2^648168842 is an apocalyptic number.

648168842 is a deficient number, since it is larger than the sum of its proper divisors (389953078).

648168842 is a wasteful number, since it uses less digits than its factorization.

648168842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327757.

The product of its digits is 589824, while the sum is 47.

The square root of 648168842 is about 25459.1602768041. The cubic root of 648168842 is about 865.4248937756.

The spelling of 648168842 in words is "six hundred forty-eight million, one hundred sixty-eight thousand, eight hundred forty-two".