1321169568 has 48 divisors (see below), whose sum is σ = 3552667776. Its totient is φ = 429647360.

The previous prime is 1321169561. The next prime is 1321169581. The reversal of 1321169568 is 8659611231.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (1321169561) 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 7 ways as a sum of consecutive naturals, for example, 163896 + ... + 171767.

It is an arithmetic number, because the mean of its divisors is an integer number (74013912).

Almost surely, 2^1321169568 is an apocalyptic number.

It is an amenable number.

1321169568 is an abundant number, since it is smaller than the sum of its proper divisors (2231498208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321169568 is a wasteful number, since it uses less digits than its factorization.

1321169568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335717 (or 335709 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 1321169568 is about 36347.8963352764. The cubic root of 1321169568 is about 1097.2851973837.

The spelling of 1321169568 in words is "one billion, three hundred twenty-one million, one hundred sixty-nine thousand, five hundred sixty-eight".