648746860789 has 16 divisors (see below), whose sum is σ = 659391321600. Its totient is φ = 638131564224.

The previous prime is 648746860787. The next prime is 648746860813. The reversal of 648746860789 is 987068647846.

It is a cyclic number.

It is not a de Polignac number, because 648746860789 - 2¹ = 648746860787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648746860787) 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, 204844284 + ... + 204847450.

It is an arithmetic number, because the mean of its divisors is an integer number (41211957600).

Almost surely, 2^648746860789 is an apocalyptic number.

It is an amenable number.

648746860789 is a deficient number, since it is larger than the sum of its proper divisors (10644460811).

648746860789 is a wasteful number, since it uses less digits than its factorization.

648746860789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732.

The product of its (nonzero) digits is 780337152, while the sum is 73.

The spelling of 648746860789 in words is "six hundred forty-eight billion, seven hundred forty-six million, eight hundred sixty thousand, seven hundred eighty-nine".