1326316605 has 32 divisors (see below), whose sum is σ = 2139955200. Its totient is φ = 701448192.

The previous prime is 1326316583. The next prime is 1326316619. The reversal of 1326316605 is 5066136231.

It is not a de Polignac number, because 1326316605 - 2¹¹ = 1326314557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1036356 + ... + 1037634.

It is an arithmetic number, because the mean of its divisors is an integer number (66873600).

Almost surely, 2^1326316605 is an apocalyptic number.

1326316605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1326316605 is a deficient number, since it is larger than the sum of its proper divisors (813638595).

1326316605 is a wasteful number, since it uses less digits than its factorization.

1326316605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 1326316605 is about 36418.6299165688. The cubic root of 1326316605 is about 1098.7082923075.

The spelling of 1326316605 in words is "one billion, three hundred twenty-six million, three hundred sixteen thousand, six hundred five".