649445712 has 20 divisors (see below), whose sum is σ = 1677734880. Its totient is φ = 216481888.

The previous prime is 649445677. The next prime is 649445717. The reversal of 649445712 is 217544946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649445717) 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 3 ways as a sum of consecutive naturals, for example, 6765012 + ... + 6765107.

It is an arithmetic number, because the mean of its divisors is an integer number (83886744).

Almost surely, 2^649445712 is an apocalyptic number.

It is an amenable number.

649445712 is an abundant number, since it is smaller than the sum of its proper divisors (1028289168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649445712 is a wasteful number, since it uses less digits than its factorization.

649445712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13530130 (or 13530124 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 649445712 is about 25484.2247674910. The cubic root of 649445712 is about 865.9928066294.

The spelling of 649445712 in words is "six hundred forty-nine million, four hundred forty-five thousand, seven hundred twelve".