648454257 has 12 divisors (see below), whose sum is σ = 1021806864. Its totient is φ = 393002520.

The previous prime is 648454243. The next prime is 648454259. The reversal of 648454257 is 752454846.

It is not a de Polignac number, because 648454257 - 2⁷ = 648454129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648454259) 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 11 ways as a sum of consecutive naturals, for example, 3274923 + ... + 3275120.

It is an arithmetic number, because the mean of its divisors is an integer number (85150572).

Almost surely, 2^648454257 is an apocalyptic number.

It is an amenable number.

648454257 is a deficient number, since it is larger than the sum of its proper divisors (373352607).

648454257 is a wasteful number, since it uses less digits than its factorization.

648454257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6550060 (or 6550057 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 45.

The square root of 648454257 is about 25464.7650097149. The cubic root of 648454257 is about 865.5519023488.

The spelling of 648454257 in words is "six hundred forty-eight million, four hundred fifty-four thousand, two hundred fifty-seven".