649049757 has 8 divisors (see below), whose sum is σ = 865517376. Its totient is φ = 432640992.

The previous prime is 649049741. The next prime is 649049813. The reversal of 649049757 is 757940946.

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

It is not a de Polignac number, because 649049757 - 2⁴ = 649049741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649049657) by changing a digit.

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, 35713 + ... + 50729.

It is an arithmetic number, because the mean of its divisors is an integer number (108189672).

Almost surely, 2^649049757 is an apocalyptic number.

It is an amenable number.

649049757 is a deficient number, since it is larger than the sum of its proper divisors (216467619).

649049757 is a wasteful number, since it uses less digits than its factorization.

649049757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29427.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The square root of 649049757 is about 25476.4549535449. The cubic root of 649049757 is about 865.8167776021.

The spelling of 649049757 in words is "six hundred forty-nine million, forty-nine thousand, seven hundred fifty-seven".