648777168 has 80 divisors (see below), whose sum is σ = 2005496640. Its totient is φ = 199622016.

The previous prime is 648777167. The next prime is 648777193. The reversal of 648777168 is 861777846.

648777168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648777167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52146 + ... + 63377.

It is an arithmetic number, because the mean of its divisors is an integer number (25068708).

Almost surely, 2^648777168 is an apocalyptic number.

It is an amenable number.

648777168 is an abundant number, since it is smaller than the sum of its proper divisors (1356719472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648777168 is a wasteful number, since it uses less digits than its factorization.

648777168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115553 (or 115541 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 648777168 is about 25471.1045696884. The cubic root of 648777168 is about 865.6955515713.

The spelling of 648777168 in words is "six hundred forty-eight million, seven hundred seventy-seven thousand, one hundred sixty-eight".