11812587909 has 8 divisors (see below), whose sum is σ = 15854423232. Its totient is φ = 7822905600.

The previous prime is 11812587883. The next prime is 11812587947. The reversal of 11812587909 is 90978521811.

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

It is not a de Polignac number, because 11812587909 - 2⁵ = 11812587877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812587959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13037724 + ... + 13038629.

It is an arithmetic number, because the mean of its divisors is an integer number (1981802904).

Almost surely, 2^11812587909 is an apocalyptic number.

It is an amenable number.

11812587909 is a deficient number, since it is larger than the sum of its proper divisors (4041835323).

11812587909 is a wasteful number, since it uses less digits than its factorization.

11812587909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26076507.

The product of its (nonzero) digits is 362880, while the sum is 51.

The spelling of 11812587909 in words is "eleven billion, eight hundred twelve million, five hundred eighty-seven thousand, nine hundred nine".