648188468 has 24 divisors (see below), whose sum is σ = 1160140800. Its totient is φ = 316739808.

The previous prime is 648188467. The next prime is 648188479. The reversal of 648188468 is 864881846.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648188467) 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, 153773 + ... + 157931.

It is an arithmetic number, because the mean of its divisors is an integer number (48339200).

Almost surely, 2^648188468 is an apocalyptic number.

It is an amenable number.

648188468 is a deficient number, since it is larger than the sum of its proper divisors (511952332).

648188468 is a wasteful number, since it uses less digits than its factorization.

648188468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039 (or 5037 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 53.

The square root of 648188468 is about 25459.5457147216. The cubic root of 648188468 is about 865.4336284634.

It can be divided in two parts, 6481 and 88468, that added together give a palindrome (94949).

The spelling of 648188468 in words is "six hundred forty-eight million, one hundred eighty-eight thousand, four hundred sixty-eight".