648333561 has 16 divisors (see below), whose sum is σ = 911969600. Its totient is φ = 408561408.

The previous prime is 648333551. The next prime is 648333563. The reversal of 648333561 is 165333846.

648333561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648333561 - 2¹³ = 648325369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648333563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13605 + ... + 38493.

It is an arithmetic number, because the mean of its divisors is an integer number (56998100).

Almost surely, 2^648333561 is an apocalyptic number.

It is an amenable number.

648333561 is a deficient number, since it is larger than the sum of its proper divisors (263636039).

648333561 is a wasteful number, since it uses less digits than its factorization.

648333561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25368.

The product of its digits is 155520, while the sum is 39.

The square root of 648333561 is about 25462.3950366025. The cubic root of 648333561 is about 865.4981976433.

The spelling of 648333561 in words is "six hundred forty-eight million, three hundred thirty-three thousand, five hundred sixty-one".