11557986409 has 8 divisors (see below), whose sum is σ = 11764343808. Its totient is φ = 11353431600.

The previous prime is 11557986397. The next prime is 11557986421. The reversal of 11557986409 is 90468975511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11557986397) and next prime (11557986421).

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-11557986409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11557986409.

It is not an unprimeable number, because it can be changed into a prime (11557986439) 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, 437707 + ... + 463360.

It is an arithmetic number, because the mean of its divisors is an integer number (1470542976).

Almost surely, 2^11557986409 is an apocalyptic number.

It is an amenable number.

11557986409 is a deficient number, since it is larger than the sum of its proper divisors (206357399).

11557986409 is a wasteful number, since it uses less digits than its factorization.

11557986409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901295.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The spelling of 11557986409 in words is "eleven billion, five hundred fifty-seven million, nine hundred eighty-six thousand, four hundred nine".