1327187509609 has 4 divisors (see below), whose sum is σ = 1429278856516. Its totient is φ = 1225096162704.

The previous prime is 1327187509607. The next prime is 1327187509643. The reversal of 1327187509609 is 9069057817231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 530461675584 + 796725834025 = 728328^2 + 892595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1327187509609 - 2¹ = 1327187509607 is a prime.

It is a super-2 number, since 2×1327187509609² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1327187509607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51045673434 + ... + 51045673459.

It is an arithmetic number, because the mean of its divisors is an integer number (357319714129).

Almost surely, 2^{1327187509609} is an apocalyptic number.

It is an amenable number.

1327187509609 is a deficient number, since it is larger than the sum of its proper divisors (102091346907).

1327187509609 is a wasteful number, since it uses less digits than its factorization.

1327187509609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102091346906.

The product of its (nonzero) digits is 5715360, while the sum is 58.

The spelling of 1327187509609 in words is "one trillion, three hundred twenty-seven billion, one hundred eighty-seven million, five hundred nine thousand, six hundred nine".