648509025 has 24 divisors (see below), whose sum is σ = 1085783680. Its totient is φ = 341490240.

The previous prime is 648509021. The next prime is 648509033. The reversal of 648509025 is 520905846.

It is not a de Polignac number, because 648509025 - 2² = 648509021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648509021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48802 + ... + 60651.

Almost surely, 2^648509025 is an apocalyptic number.

It is an amenable number.

648509025 is a deficient number, since it is larger than the sum of its proper divisors (437274655).

648509025 is a wasteful number, since it uses less digits than its factorization.

648509025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109545 (or 109540 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 648509025 is about 25465.8403552681. The cubic root of 648509025 is about 865.5762696353.

The spelling of 648509025 in words is "six hundred forty-eight million, five hundred nine thousand, twenty-five".