630648809956 has 27 divisors (see below), whose sum is σ = 1213120471017. Its totient is φ = 286650608640.

The previous prime is 630648809953. The next prime is 630648809983. The reversal of 630648809956 is 659908846036.

The square root of 630648809956 is 794134.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 101270332900 + 529378477056 = 318230^2 + 727584^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630648809953) 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 8 ways as a sum of consecutive naturals, for example, 17452900 + ... + 17488996.

Almost surely, 2^630648809956 is an apocalyptic number.

630648809956 is the 794134-th square number.

It is an amenable number.

630648809956 is a deficient number, since it is larger than the sum of its proper divisors (582471661061).

630648809956 is an frugal number, since it uses more digits than its factorization.

630648809956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72220 (or 36110 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 64.

Multiplying 630648809956 by its sum of digits (64), we get a square (40361523837184 = 6353072²).

The spelling of 630648809956 in words is "six hundred thirty billion, six hundred forty-eight million, eight hundred nine thousand, nine hundred fifty-six".