648885781326 has 16 divisors (see below), whose sum is σ = 1297783327104. Its totient is φ = 216293299704.

The previous prime is 648885781321. The next prime is 648885781333. The reversal of 648885781326 is 623187588846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648885781321) 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, 333255 + ... + 1186941.

It is an arithmetic number, because the mean of its divisors is an integer number (81111457944).

Almost surely, 2^648885781326 is an apocalyptic number.

648885781326 is an abundant number, since it is smaller than the sum of its proper divisors (648897545778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648885781326 is a wasteful number, since it uses less digits than its factorization.

648885781326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980375.

The product of its digits is 123863040, while the sum is 66.

The spelling of 648885781326 in words is "six hundred forty-eight billion, eight hundred eighty-five million, seven hundred eighty-one thousand, three hundred twenty-six".