1909665141939 has 48 divisors (see below), whose sum is σ = 2911709881600. Its totient is φ = 1202733499968.

The previous prime is 1909665141919. The next prime is 1909665141953. The reversal of 1909665141939 is 9391415669091.

1909665141939 is a `hidden beast` number, since 19 + 0 + 9 + 66 + 514 + 19 + 39 = 666.

It is not a de Polignac number, because 1909665141939 - 2¹² = 1909665137843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1909665141919) 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, 102226602 + ... + 102245280.

Almost surely, 2^{1909665141939} is an apocalyptic number.

1909665141939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1909665141939 is a deficient number, since it is larger than the sum of its proper divisors (1002044739661).

1909665141939 is a wasteful number, since it uses less digits than its factorization.

1909665141939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20344 (or 20341 counting only the distinct ones).

The product of its (nonzero) digits is 14171760, while the sum is 63.

The spelling of 1909665141939 in words is "one trillion, nine hundred nine billion, six hundred sixty-five million, one hundred forty-one thousand, nine hundred thirty-nine".