649938676 has 12 divisors (see below), whose sum is σ = 1138936960. Its totient is φ = 324528120.

The previous prime is 649938617. The next prime is 649938689. The reversal of 649938676 is 676839946.

It is a self number, because there is not a number n which added to its sum of digits gives 649938676.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 106980 + ... + 112891.

Almost surely, 2^649938676 is an apocalyptic number.

It is an amenable number.

649938676 is a deficient number, since it is larger than the sum of its proper divisors (488998284).

649938676 is a wasteful number, since it uses less digits than its factorization.

649938676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220614 (or 220612 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 58.

The square root of 649938676 is about 25493.8948770093. The cubic root of 649938676 is about 866.2118628191.

The spelling of 649938676 in words is "six hundred forty-nine million, nine hundred thirty-eight thousand, six hundred seventy-six".