11800609782509 has 16 divisors (see below), whose sum is σ = 11953340211456. Its totient is φ = 11648901264000.

The previous prime is 11800609782497. The next prime is 11800609782517. The reversal of 11800609782509 is 90528790600811.

It is a cyclic number.

It is not a de Polignac number, because 11800609782509 - 2⁸ = 11800609782253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11800609782209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89631089 + ... + 89762649.

It is an arithmetic number, because the mean of its divisors is an integer number (747083763216).

Almost surely, 2^{11800609782509} is an apocalyptic number.

It is an amenable number.

11800609782509 is a deficient number, since it is larger than the sum of its proper divisors (152730428947).

11800609782509 is a wasteful number, since it uses less digits than its factorization.

11800609782509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135436.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 11800609782509 in words is "eleven trillion, eight hundred billion, six hundred nine million, seven hundred eighty-two thousand, five hundred nine".