1809113125499 has 8 divisors (see below), whose sum is σ = 1998815525280. Its totient is φ = 1628664501376.

The previous prime is 1809113125493. The next prime is 1809113125511. The reversal of 1809113125499 is 9945213119081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1809113125499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1809113125499.

It is not an unprimeable number, because it can be changed into a prime (1809113125493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2313443504 + ... + 2313444285.

It is an arithmetic number, because the mean of its divisors is an integer number (249851940660).

Almost surely, 2^{1809113125499} is an apocalyptic number.

1809113125499 is a deficient number, since it is larger than the sum of its proper divisors (189702399781).

1809113125499 is a wasteful number, since it uses less digits than its factorization.

1809113125499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626887829.

The product of its (nonzero) digits is 699840, while the sum is 53.

The spelling of 1809113125499 in words is "one trillion, eight hundred nine billion, one hundred thirteen million, one hundred twenty-five thousand, four hundred ninety-nine".