648034340646 has 64 divisors (see below), whose sum is σ = 1639995494400. Its totient is φ = 165808352160.

The previous prime is 648034340633. The next prime is 648034340647. The reversal of 648034340646 is 646043430846.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 648034340595 and 648034340604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648034340647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10436746 + ... + 10498653.

It is an arithmetic number, because the mean of its divisors is an integer number (25624929600).

Almost surely, 2^648034340646 is an apocalyptic number.

648034340646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

648034340646 is an abundant number, since it is smaller than the sum of its proper divisors (991961153754).

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

648034340646 is a wasteful number, since it uses less digits than its factorization.

648034340646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20935489.

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 648034340646 in words is "six hundred forty-eight billion, thirty-four million, three hundred forty thousand, six hundred forty-six".