648466225 has 27 divisors (see below), whose sum is σ = 885756459. Its totient is φ = 470593200.

The previous prime is 648466223. The next prime is 648466237. The reversal of 648466225 is 522664846.

The square root of 648466225 is 25465.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 233447841 + 415018384 = 15279^2 + 20372^2 .

It is not a de Polignac number, because 648466225 - 2¹ = 648466223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648466223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1400344 + ... + 1400806.

Almost surely, 2^648466225 is an apocalyptic number.

648466225 is the 25465-th square number.

648466225 is the 12733-rd centered octagonal number.

It is an amenable number.

648466225 is a deficient number, since it is larger than the sum of its proper divisors (237290234).

648466225 is an equidigital number, since it uses as much as digits as its factorization.

648466225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 479 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The cubic root of 648466225 is about 865.5572272484.

The spelling of 648466225 in words is "six hundred forty-eight million, four hundred sixty-six thousand, two hundred twenty-five".