1163321613 has 12 divisors (see below), whose sum is σ = 1719432000. Its totient is φ = 757511496.

The previous prime is 1163321597. The next prime is 1163321639. The reversal of 1163321613 is 3161233611.

1163321613 is a `hidden beast` number, since 1 + 1 + 633 + 2 + 16 + 13 = 666.

It is not a de Polignac number, because 1163321613 - 2⁴ = 1163321597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163321693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1502613 + ... + 1503386.

It is an arithmetic number, because the mean of its divisors is an integer number (143286000).

Almost surely, 2^1163321613 is an apocalyptic number.

It is an amenable number.

1163321613 is a deficient number, since it is larger than the sum of its proper divisors (556110387).

1163321613 is a wasteful number, since it uses less digits than its factorization.

1163321613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006048 (or 3006045 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1163321613 is about 34107.5008319285. The cubic root of 1163321613 is about 1051.7195145022.

The spelling of 1163321613 in words is "one billion, one hundred sixty-three million, three hundred twenty-one thousand, six hundred thirteen".