11871651009 has 8 divisors (see below), whose sum is σ = 15953505280. Its totient is φ = 7852115376.

The previous prime is 11871650971. The next prime is 11871651017. The reversal of 11871651009 is 90015617811.

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

It is not a de Polignac number, because 11871651009 - 2²³ = 11863262401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11871651049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15579214 + ... + 15579975.

It is an arithmetic number, because the mean of its divisors is an integer number (1994188160).

Almost surely, 2^11871651009 is an apocalyptic number.

It is an amenable number.

11871651009 is a deficient number, since it is larger than the sum of its proper divisors (4081854271).

11871651009 is a wasteful number, since it uses less digits than its factorization.

11871651009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31159319.

The product of its (nonzero) digits is 15120, while the sum is 39.

The spelling of 11871651009 in words is "eleven billion, eight hundred seventy-one million, six hundred fifty-one thousand, nine".