631764648 has 24 divisors (see below), whose sum is σ = 1711029450. Its totient is φ = 210588192.

The previous prime is 631764607. The next prime is 631764671. The reversal of 631764648 is 846467136.

It is a happy number.

631764648 is a `hidden beast` number, since 631 + 7 + 6 + 4 + 6 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 629909604 + 1855044 = 25098^2 + 1362^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4387183 + ... + 4387326.

Almost surely, 2^631764648 is an apocalyptic number.

It is an amenable number.

631764648 is an abundant number, since it is smaller than the sum of its proper divisors (1079264802).

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

631764648 is a wasteful number, since it uses less digits than its factorization.

631764648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8774521 (or 8774514 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 631764648 is about 25134.9288441404. The cubic root of 631764648 is about 858.0615470870.

The spelling of 631764648 in words is "six hundred thirty-one million, seven hundred sixty-four thousand, six hundred forty-eight".