648540375 has 64 divisors (see below), whose sum is σ = 1245404160. Its totient is φ = 293577600.

The previous prime is 648540371. The next prime is 648540437. The reversal of 648540375 is 573045846.

It is not a de Polignac number, because 648540375 - 2² = 648540371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648540371) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 279721 + ... + 282029.

It is an arithmetic number, because the mean of its divisors is an integer number (19459440).

Almost surely, 2^648540375 is an apocalyptic number.

648540375 is a deficient number, since it is larger than the sum of its proper divisors (596863785).

648540375 is a wasteful number, since it uses less digits than its factorization.

648540375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2431 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

The square root of 648540375 is about 25466.4558782725. The cubic root of 648540375 is about 865.5902172072.

The spelling of 648540375 in words is "six hundred forty-eight million, five hundred forty thousand, three hundred seventy-five".