648121875 has 48 divisors (see below), whose sum is σ = 1088367840. Its totient is φ = 343040000.

The previous prime is 648121829. The next prime is 648121879. The reversal of 648121875 is 578121846.

It is not a de Polignac number, because 648121875 - 2⁶ = 648121811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648121879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2409241 + ... + 2409509.

It is an arithmetic number, because the mean of its divisors is an integer number (22674330).

Almost surely, 2^648121875 is an apocalyptic number.

648121875 is a deficient number, since it is larger than the sum of its proper divisors (440245965).

648121875 is an equidigital number, since it uses as much as digits as its factorization.

648121875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 534 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 648121875 is about 25458.2378612503. The cubic root of 648121875 is about 865.4039900695.

The spelling of 648121875 in words is "six hundred forty-eight million, one hundred twenty-one thousand, eight hundred seventy-five".