1321768855 has 32 divisors (see below), whose sum is σ = 1819957248. Its totient is φ = 912662400.

The previous prime is 1321768849. The next prime is 1321768897. The reversal of 1321768855 is 5588671231.

It is a de Polignac number, because none of the positive numbers 2^k-1321768855 is a prime.

It is a super-2 number, since 2×1321768855² = 3494145812096022050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 83052 + ... + 97678.

It is an arithmetic number, because the mean of its divisors is an integer number (56873664).

Almost surely, 2^1321768855 is an apocalyptic number.

1321768855 is a deficient number, since it is larger than the sum of its proper divisors (498188393).

1321768855 is a wasteful number, since it uses less digits than its factorization.

1321768855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14727.

The product of its digits is 403200, while the sum is 46.

The square root of 1321768855 is about 36356.1391652084. The cubic root of 1321768855 is about 1097.4510830673.

The spelling of 1321768855 in words is "one billion, three hundred twenty-one million, seven hundred sixty-eight thousand, eight hundred fifty-five".