648240440206 has 8 divisors (see below), whose sum is σ = 990707088024. Its totient is φ = 318004744200.

The previous prime is 648240440203. The next prime is 648240440219. The reversal of 648240440206 is 602044042846.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×648240440206² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648240440203) 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 3 ways as a sum of consecutive naturals, for example, 3057737820 + ... + 3057738031.

It is an arithmetic number, because the mean of its divisors is an integer number (123838386003).

Almost surely, 2^648240440206 is an apocalyptic number.

648240440206 is a deficient number, since it is larger than the sum of its proper divisors (342466647818).

648240440206 is a wasteful number, since it uses less digits than its factorization.

648240440206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115475906.

The product of its (nonzero) digits is 294912, while the sum is 40.

The spelling of 648240440206 in words is "six hundred forty-eight billion, two hundred forty million, four hundred forty thousand, two hundred six".