648111333 has 4 divisors (see below), whose sum is σ = 864148448. Its totient is φ = 432074220.

The previous prime is 648111311. The next prime is 648111377. The reversal of 648111333 is 333111846.

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 648111333 - 2²⁶ = 581002469 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 648111333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648111133) 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, 108018553 + ... + 108018558.

It is an arithmetic number, because the mean of its divisors is an integer number (216037112).

Almost surely, 2^648111333 is an apocalyptic number.

It is an amenable number.

648111333 is a deficient number, since it is larger than the sum of its proper divisors (216037115).

648111333 is a wasteful number, since it uses less digits than its factorization.

648111333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216037114.

The product of its digits is 5184, while the sum is 30.

The square root of 648111333 is about 25458.0308154421. The cubic root of 648111333 is about 865.3992979796.

The spelling of 648111333 in words is "six hundred forty-eight million, one hundred eleven thousand, three hundred thirty-three".