648611049 has 4 divisors (see below), whose sum is σ = 864814736. Its totient is φ = 432407364.

The previous prime is 648611039. The next prime is 648611087. The reversal of 648611049 is 940116846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 648611049 - 2⁸ = 648610793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 648610998 and 648611016.

It is not an unprimeable number, because it can be changed into a prime (648611039) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 108101839 + ... + 108101844.

It is an arithmetic number, because the mean of its divisors is an integer number (216203684).

Almost surely, 2^648611049 is an apocalyptic number.

It is an amenable number.

648611049 is a deficient number, since it is larger than the sum of its proper divisors (216203687).

648611049 is a wasteful number, since it uses less digits than its factorization.

648611049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216203686.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 648611049 is about 25467.8434304909. The cubic root of 648611049 is about 865.6216583240.

The spelling of 648611049 in words is "six hundred forty-eight million, six hundred eleven thousand, forty-nine".