648355925 has 24 divisors (see below), whose sum is σ = 925553856. Its totient is φ = 441325440.

The previous prime is 648355913. The next prime is 648355927. The reversal of 648355925 is 529553846.

It is not a de Polignac number, because 648355925 - 2¹⁴ = 648339541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648355925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648355927) 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, 10454 + ... + 37496.

It is an arithmetic number, because the mean of its divisors is an integer number (38564744).

Almost surely, 2^648355925 is an apocalyptic number.

It is an amenable number.

648355925 is a deficient number, since it is larger than the sum of its proper divisors (277197931).

648355925 is a wasteful number, since it uses less digits than its factorization.

648355925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27197 (or 27192 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 47.

The square root of 648355925 is about 25462.8341902468. The cubic root of 648355925 is about 865.5081491972.

The spelling of 648355925 in words is "six hundred forty-eight million, three hundred fifty-five thousand, nine hundred twenty-five".