1326643256 has 16 divisors (see below), whose sum is σ = 2515406400. Its totient is φ = 655868224.

The previous prime is 1326643237. The next prime is 1326643277. The reversal of 1326643256 is 6523466231.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930920 + ... + 932343.

It is an arithmetic number, because the mean of its divisors is an integer number (157212900).

Almost surely, 2^1326643256 is an apocalyptic number.

It is an amenable number.

1326643256 is a deficient number, since it is larger than the sum of its proper divisors (1188763144).

1326643256 is a wasteful number, since it uses less digits than its factorization.

1326643256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863358 (or 1863354 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 1326643256 is about 36423.1143094601. The cubic root of 1326643256 is about 1098.7984831166.

The spelling of 1326643256 in words is "one billion, three hundred twenty-six million, six hundred forty-three thousand, two hundred fifty-six".