1839668407509 has 16 divisors (see below), whose sum is σ = 2621451636288. Its totient is φ = 1143513875712.

The previous prime is 1839668407501. The next prime is 1839668407529. The reversal of 1839668407509 is 9057048669381.

It is not a de Polignac number, because 1839668407509 - 2³ = 1839668407501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1839668407509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1839668407501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168554962 + ... + 168565875.

It is an arithmetic number, because the mean of its divisors is an integer number (163840727268).

Almost surely, 2^{1839668407509} is an apocalyptic number.

It is an amenable number.

1839668407509 is a deficient number, since it is larger than the sum of its proper divisors (781783228779).

1839668407509 is a wasteful number, since it uses less digits than its factorization.

1839668407509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337120964.

The product of its (nonzero) digits is 78382080, while the sum is 66.

The spelling of 1839668407509 in words is "one trillion, eight hundred thirty-nine billion, six hundred sixty-eight million, four hundred seven thousand, five hundred nine".