11581710856 has 64 divisors (see below), whose sum is σ = 22850150400. Its totient is φ = 5496033600.

The previous prime is 11581710821. The next prime is 11581710869. The reversal of 11581710856 is 65801718511.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9407761 + ... + 9408991.

It is an arithmetic number, because the mean of its divisors is an integer number (357033600).

Almost surely, 2^11581710856 is an apocalyptic number.

It is an amenable number.

11581710856 is a deficient number, since it is larger than the sum of its proper divisors (11268439544).

11581710856 is a wasteful number, since it uses less digits than its factorization.

11581710856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 1966 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 43.

The spelling of 11581710856 in words is "eleven billion, five hundred eighty-one million, seven hundred ten thousand, eight hundred fifty-six".