649456559 has 4 divisors (see below), whose sum is σ = 687659904. Its totient is φ = 611253216.

The previous prime is 649456531. The next prime is 649456567. The reversal of 649456559 is 955654946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 649456559 - 2²⁸ = 381021103 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 649456559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649456519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19101647 + ... + 19101680.

It is an arithmetic number, because the mean of its divisors is an integer number (171914976).

Almost surely, 2^649456559 is an apocalyptic number.

649456559 is a deficient number, since it is larger than the sum of its proper divisors (38203345).

649456559 is a wasteful number, since it uses less digits than its factorization.

649456559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38203344.

The product of its digits is 5832000, while the sum is 53.

The square root of 649456559 is about 25484.4375845338. The cubic root of 649456559 is about 865.9976278543.

The spelling of 649456559 in words is "six hundred forty-nine million, four hundred fifty-six thousand, five hundred fifty-nine".