649143634 has 16 divisors (see below), whose sum is σ = 980179200. Its totient is φ = 322423920.

The previous prime is 649143617. The next prime is 649143647. The reversal of 649143634 is 436341946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253392 + ... + 255940.

It is an arithmetic number, because the mean of its divisors is an integer number (61261200).

Almost surely, 2^649143634 is an apocalyptic number.

649143634 is a deficient number, since it is larger than the sum of its proper divisors (331035566).

649143634 is a wasteful number, since it uses less digits than its factorization.

649143634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345.

The product of its digits is 186624, while the sum is 40.

The square root of 649143634 is about 25478.2973135961. The cubic root of 649143634 is about 865.8585188104.

The spelling of 649143634 in words is "six hundred forty-nine million, one hundred forty-three thousand, six hundred thirty-four".