1563967648 has 24 divisors (see below), whose sum is σ = 3080380212. Its totient is φ = 781648896.

The previous prime is 1563967633. The next prime is 1563967679. The reversal of 1563967648 is 8467693651.

It can be written as a sum of positive squares in 2 ways, for example, as 1298016784 + 265950864 = 36028^2 + 16308^2 .

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76536 + ... + 94792.

Almost surely, 2^1563967648 is an apocalyptic number.

It is an amenable number.

1563967648 is a deficient number, since it is larger than the sum of its proper divisors (1516412564).

1563967648 is a wasteful number, since it uses less digits than its factorization.

1563967648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20944 (or 20936 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The square root of 1563967648 is about 39547.0308367139. The cubic root of 1563967648 is about 1160.7604130318.

The spelling of 1563967648 in words is "one billion, five hundred sixty-three million, nine hundred sixty-seven thousand, six hundred forty-eight".