649783885 has 8 divisors (see below), whose sum is σ = 780927840. Its totient is φ = 519035664.

The previous prime is 649783873. The next prime is 649783909. The reversal of 649783885 is 588387946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649783885 - 2⁵ = 649783853 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 95307 + ... + 101896.

It is an arithmetic number, because the mean of its divisors is an integer number (97615980).

Almost surely, 2^649783885 is an apocalyptic number.

It is an amenable number.

649783885 is a deficient number, since it is larger than the sum of its proper divisors (131143955).

649783885 is a wasteful number, since it uses less digits than its factorization.

649783885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197867.

The product of its digits is 11612160, while the sum is 58.

The square root of 649783885 is about 25490.8588517531. The cubic root of 649783885 is about 866.1430909738.

The spelling of 649783885 in words is "six hundred forty-nine million, seven hundred eighty-three thousand, eight hundred eighty-five".