648881125 has 8 divisors (see below), whose sum is σ = 809803800. Its totient is φ = 519104800.

The previous prime is 648881117. The next prime is 648881147. The reversal of 648881125 is 521188846.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 648873729 = 86^2 + 25473^2 .

It is not a de Polignac number, because 648881125 - 2³ = 648881117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2595400 + ... + 2595649.

It is an arithmetic number, because the mean of its divisors is an integer number (101225475).

Almost surely, 2^648881125 is an apocalyptic number.

It is an amenable number.

648881125 is a deficient number, since it is larger than the sum of its proper divisors (160922675).

648881125 is an equidigital number, since it uses as much as digits as its factorization.

648881125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191064 (or 5191054 counting only the distinct ones).

The product of its digits is 122880, while the sum is 43.

The square root of 648881125 is about 25473.1451729071. The cubic root of 648881125 is about 865.7417874288.

The spelling of 648881125 in words is "six hundred forty-eight million, eight hundred eighty-one thousand, one hundred twenty-five".