649049759 has 8 divisors (see below), whose sum is σ = 671024640. Its totient is φ = 627139800.

The previous prime is 649049741. The next prime is 649049813. The reversal of 649049759 is 957940946.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649049759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649049759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649049959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4544 + ... + 36314.

It is an arithmetic number, because the mean of its divisors is an integer number (83878080).

Almost surely, 2^649049759 is an apocalyptic number.

649049759 is a deficient number, since it is larger than the sum of its proper divisors (21974881).

649049759 is a wasteful number, since it uses less digits than its factorization.

649049759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32461.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 649049759 is about 25476.4549927968. The cubic root of 649049759 is about 865.8167784914.

The spelling of 649049759 in words is "six hundred forty-nine million, forty-nine thousand, seven hundred fifty-nine".