649910756 has 24 divisors (see below), whose sum is σ = 1252130880. Its totient is φ = 292701600.

The previous prime is 649910693. The next prime is 649910777. The reversal of 649910756 is 657019946.

It is a self number, because there is not a number n which added to its sum of digits gives 649910756.

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 7 ways as a sum of consecutive naturals, for example, 62960 + ... + 72551.

It is an arithmetic number, because the mean of its divisors is an integer number (52172120).

Almost surely, 2^649910756 is an apocalyptic number.

It is an amenable number.

649910756 is a deficient number, since it is larger than the sum of its proper divisors (602220124).

649910756 is a wasteful number, since it uses less digits than its factorization.

649910756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135635 (or 135633 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 649910756 is about 25493.3472890478. The cubic root of 649910756 is about 866.1994590942.

The spelling of 649910756 in words is "six hundred forty-nine million, nine hundred ten thousand, seven hundred fifty-six".