1318492621809 has 48 divisors (see below), whose sum is σ = 2228869581120. Its totient is φ = 771531687360.

The previous prime is 1318492621799. The next prime is 1318492621813. The reversal of 1318492621809 is 9081262948131.

It is a happy number.

1318492621809 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 4 + 9 + 2 + 621 + 8 + 0 + 9 = 666.

It is not a de Polignac number, because 1318492621809 - 2⁴ = 1318492621793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1318492621819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8427022 + ... + 8582055.

It is an arithmetic number, because the mean of its divisors is an integer number (46434782940).

Almost surely, 2^{1318492621809} is an apocalyptic number.

It is an amenable number.

1318492621809 is a deficient number, since it is larger than the sum of its proper divisors (910376959311).

1318492621809 is a wasteful number, since it uses less digits than its factorization.

1318492621809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17009132 (or 17009120 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 1318492621809 in words is "one trillion, three hundred eighteen billion, four hundred ninety-two million, six hundred twenty-one thousand, eight hundred nine".