1323988518609 has 9 divisors (see below), whose sum is σ = 1912432846363. Its totient is φ = 882656711112.

The previous prime is 1323988518569. The next prime is 1323988518631. The reversal of 1323988518609 is 9068158893231.

The square root of 1323988518609 is 1150647.

It is a perfect power (a square), and thus also a powerful number.

1323988518609 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 9 + 8 + 8 + 5 + 18 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1170622294209 + 153366224400 = 1081953^2 + 391620^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1323988518609 - 2¹³ = 1323988510417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323988518659) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3260167 + ... + 3643715.

Almost surely, 2^{1323988518609} is an apocalyptic number.

1323988518609 is the 1150647-th square number.

1323988518609 is the 575324-th centered octagonal number.

It is an amenable number.

1323988518609 is a deficient number, since it is larger than the sum of its proper divisors (588444327754).

1323988518609 is an frugal number, since it uses more digits than its factorization.

1323988518609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767104 (or 383552 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 1323988518609 in words is "one trillion, three hundred twenty-three billion, nine hundred eighty-eight million, five hundred eighteen thousand, six hundred nine".