1320063664 has 40 divisors (see below), whose sum is σ = 2598583680. Its totient is φ = 649532928.

The previous prime is 1320063659. The next prime is 1320063677. The reversal of 1320063664 is 4663600231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315474 + ... + 319630.

It is an arithmetic number, because the mean of its divisors is an integer number (64964592).

Almost surely, 2^1320063664 is an apocalyptic number.

It is an amenable number.

1320063664 is a deficient number, since it is larger than the sum of its proper divisors (1278520016).

1320063664 is a wasteful number, since it uses less digits than its factorization.

1320063664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4477 (or 4471 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 1320063664 is about 36332.6803855702. The cubic root of 1320063664 is about 1096.9789457951.

Adding to 1320063664 its reverse (4663600231), we get a palindrome (5983663895).

The spelling of 1320063664 in words is "one billion, three hundred twenty million, sixty-three thousand, six hundred sixty-four".