649768468 has 24 divisors (see below), whose sum is σ = 1154902952. Its totient is φ = 319832064.

The previous prime is 649768459. The next prime is 649768477. The reversal of 649768468 is 864867946.

649768468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (649768459) and next prime (649768477).

It can be written as a sum of positive squares in 4 ways, for example, as 7551504 + 642216964 = 2748^2 + 25342^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70546 + ... + 79222.

Almost surely, 2^649768468 is an apocalyptic number.

It is an amenable number.

649768468 is a deficient number, since it is larger than the sum of its proper divisors (505134484).

649768468 is a wasteful number, since it uses less digits than its factorization.

649768468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8971 (or 8969 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 58.

The square root of 649768468 is about 25490.5564474375. The cubic root of 649768468 is about 866.1362407815.

The spelling of 649768468 in words is "six hundred forty-nine million, seven hundred sixty-eight thousand, four hundred sixty-eight".