648243066649 has 8 divisors (see below), whose sum is σ = 686686615200. Its totient is φ = 609834140736.

The previous prime is 648243066629. The next prime is 648243066689. The reversal of 648243066649 is 946660342846.

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

It is a cyclic number.

It is not a de Polignac number, because 648243066649 - 2¹⁵ = 648243033881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 648243066593 and 648243066602.

It is not an unprimeable number, because it can be changed into a prime (648243066629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8617099 + ... + 8692000.

It is an arithmetic number, because the mean of its divisors is an integer number (85835826900).

Almost surely, 2^648243066649 is an apocalyptic number.

It is an amenable number.

648243066649 is a deficient number, since it is larger than the sum of its proper divisors (38443548551).

648243066649 is a wasteful number, since it uses less digits than its factorization.

648243066649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17311319.

The product of its (nonzero) digits is 35831808, while the sum is 58.

The spelling of 648243066649 in words is "six hundred forty-eight billion, two hundred forty-three million, sixty-six thousand, six hundred forty-nine".