649049758 has 16 divisors (see below), whose sum is σ = 1112988384. Its totient is φ = 278081280.

The previous prime is 649049741. The next prime is 649049813. The reversal of 649049758 is 857940946.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76278 + ... + 84358.

It is an arithmetic number, because the mean of its divisors is an integer number (69561774).

Almost surely, 2^649049758 is an apocalyptic number.

649049758 is a deficient number, since it is larger than the sum of its proper divisors (463938626).

649049758 is a wasteful number, since it uses less digits than its factorization.

649049758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13827.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 649049758 is about 25476.4549731708. The cubic root of 649049758 is about 865.8167780468.

The spelling of 649049758 in words is "six hundred forty-nine million, forty-nine thousand, seven hundred fifty-eight".