1311533663 has 8 divisors (see below), whose sum is σ = 1514926800. Its totient is φ = 1122167680.

The previous prime is 1311533659. The next prime is 1311533681. The reversal of 1311533663 is 3663351131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311533663 - 2² = 1311533659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311533693) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3506588 + ... + 3506961.

It is an arithmetic number, because the mean of its divisors is an integer number (189365850).

Almost surely, 2^1311533663 is an apocalyptic number.

1311533663 is a deficient number, since it is larger than the sum of its proper divisors (203393137).

1311533663 is a wasteful number, since it uses less digits than its factorization.

1311533663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7013577.

The product of its digits is 14580, while the sum is 32.

The square root of 1311533663 is about 36215.1026921090. The cubic root of 1311533663 is about 1094.6110147848.

Adding to 1311533663 its reverse (3663351131), we get a palindrome (4974884794).

The spelling of 1311533663 in words is "one billion, three hundred eleven million, five hundred thirty-three thousand, six hundred sixty-three".