649009525 has 12 divisors (see below), whose sum is σ = 805132000. Its totient is φ = 518975280.

The previous prime is 649009523. The next prime is 649009547. The reversal of 649009525 is 525900946.

It is not a de Polignac number, because 649009525 - 2¹ = 649009523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649009523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71176 + ... + 79774.

Almost surely, 2^649009525 is an apocalyptic number.

It is an amenable number.

649009525 is a deficient number, since it is larger than the sum of its proper divisors (156122475).

649009525 is a wasteful number, since it uses less digits than its factorization.

649009525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11628 (or 11623 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 649009525 is about 25475.6653495056. The cubic root of 649009525 is about 865.7988877254.

The spelling of 649009525 in words is "six hundred forty-nine million, nine thousand, five hundred twenty-five".