648763206 has 64 divisors (see below), whose sum is σ = 1605574656. Its totient is φ = 170179200.

The previous prime is 648763169. The next prime is 648763207. The reversal of 648763206 is 602367846.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648763207) 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, 101176 + ... + 107396.

It is an arithmetic number, because the mean of its divisors is an integer number (25087104).

Almost surely, 2^648763206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648763206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802787328).

648763206 is an abundant number, since it is smaller than the sum of its proper divisors (956811450).

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

648763206 is a wasteful number, since it uses less digits than its factorization.

648763206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 648763206 is about 25470.8304929384. The cubic root of 648763206 is about 865.6893414637.

The spelling of 648763206 in words is "six hundred forty-eight million, seven hundred sixty-three thousand, two hundred six".