1326316557 has 16 divisors (see below), whose sum is σ = 1874102400. Its totient is φ = 831462912.

The previous prime is 1326316531. The next prime is 1326316571. The reversal of 1326316557 is 7556136231.

It is not a de Polignac number, because 1326316557 - 2⁷ = 1326316429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326316517) 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 15 ways as a sum of consecutive naturals, for example, 49944 + ... + 71742.

It is an arithmetic number, because the mean of its divisors is an integer number (117131400).

Almost surely, 2^1326316557 is an apocalyptic number.

1326316557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1326316557 is a deficient number, since it is larger than the sum of its proper divisors (547785843).

1326316557 is a wasteful number, since it uses less digits than its factorization.

1326316557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23012.

The product of its digits is 113400, while the sum is 39.

The square root of 1326316557 is about 36418.6292575654. The cubic root of 1326316557 is about 1098.7082790533.

The spelling of 1326316557 in words is "one billion, three hundred twenty-six million, three hundred sixteen thousand, five hundred fifty-seven".