649595412 has 18 divisors (see below), whose sum is σ = 1642032938. Its totient is φ = 216531792.

The previous prime is 649595407. The next prime is 649595423. The reversal of 649595412 is 214595946.

649595412 is a `hidden beast` number, since 6 + 49 + 595 + 4 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 443270916 + 206324496 = 21054^2 + 14364^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9022123 + ... + 9022194.

Almost surely, 2^649595412 is an apocalyptic number.

It is an amenable number.

649595412 is an abundant number, since it is smaller than the sum of its proper divisors (992437526).

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

649595412 is a wasteful number, since it uses less digits than its factorization.

649595412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18044327 (or 18044322 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 649595412 is about 25487.1617093783. The cubic root of 649595412 is about 866.0593398598.

The spelling of 649595412 in words is "six hundred forty-nine million, five hundred ninety-five thousand, four hundred twelve".