648388925 has 24 divisors (see below), whose sum is σ = 874325736. Its totient is φ = 474992640.

The previous prime is 648388921. The next prime is 648388933. The reversal of 648388925 is 529883846.

648388925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 29474041 + 618914884 = 5429^2 + 24878^2 .

It is not a de Polignac number, because 648388925 - 2² = 648388921 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648388921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4892 + ... + 36341.

It is an arithmetic number, because the mean of its divisors is an integer number (36430239).

Almost surely, 2^648388925 is an apocalyptic number.

It is an amenable number.

648388925 is a deficient number, since it is larger than the sum of its proper divisors (225936811).

648388925 is a wasteful number, since it uses less digits than its factorization.

648388925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41297 (or 41292 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 53.

The square root of 648388925 is about 25463.4821852786. The cubic root of 648388925 is about 865.5228331505.

The spelling of 648388925 in words is "six hundred forty-eight million, three hundred eighty-eight thousand, nine hundred twenty-five".