649899674 has 32 divisors (see below), whose sum is σ = 1049215680. Its totient is φ = 300972672.

The previous prime is 649899671. The next prime is 649899689. The reversal of 649899674 is 476998946.

It is not an unprimeable number, because it can be changed into a prime (649899671) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1053014 + ... + 1053630.

It is an arithmetic number, because the mean of its divisors is an integer number (32787990).

Almost surely, 2^649899674 is an apocalyptic number.

649899674 is a deficient number, since it is larger than the sum of its proper divisors (399316006).

649899674 is a wasteful number, since it uses less digits than its factorization.

649899674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214.

The product of its digits is 23514624, while the sum is 62.

The square root of 649899674 is about 25493.1299372988. The cubic root of 649899674 is about 866.1945357121.

The spelling of 649899674 in words is "six hundred forty-nine million, eight hundred ninety-nine thousand, six hundred seventy-four".