1317445389909 has 36 divisors (see below), whose sum is σ = 2116903003488. Its totient is φ = 788831796720.

The previous prime is 1317445389853. The next prime is 1317445389937. The reversal of 1317445389909 is 9099835447131.

1317445389909 is a `hidden beast` number, since 1 + 3 + 1 + 7 + 4 + 4 + 538 + 9 + 90 + 9 = 666.

It is not a de Polignac number, because 1317445389909 - 2²¹ = 1317443292757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317445389959) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7197417 + ... + 7378190.

It is an arithmetic number, because the mean of its divisors is an integer number (58802861208).

Almost surely, 2^{1317445389909} is an apocalyptic number.

It is an amenable number.

1317445389909 is a deficient number, since it is larger than the sum of its proper divisors (799457613579).

1317445389909 is a wasteful number, since it uses less digits than its factorization.

1317445389909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14575718 (or 14575704 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The spelling of 1317445389909 in words is "one trillion, three hundred seventeen billion, four hundred forty-five million, three hundred eighty-nine thousand, nine hundred nine".