649406025 has 48 divisors (see below), whose sum is σ = 1198048320. Its totient is φ = 344880000.

The previous prime is 649405993. The next prime is 649406041. The reversal of 649406025 is 520604946.

649406025 is a `hidden beast` number, since 6 + 4 + 9 + 40 + 602 + 5 = 666.

649406025 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 649406025 - 2⁵ = 649405993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 167509 + ... + 171341.

It is an arithmetic number, because the mean of its divisors is an integer number (24959340).

Almost surely, 2^649406025 is an apocalyptic number.

It is an amenable number.

649406025 is a deficient number, since it is larger than the sum of its proper divisors (548642295).

649406025 is a wasteful number, since it uses less digits than its factorization.

649406025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103 (or 4092 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 649406025 is about 25483.4460974178. The cubic root of 649406025 is about 865.9751662754.

The spelling of 649406025 in words is "six hundred forty-nine million, four hundred six thousand, twenty-five".