11580720540856 has 32 divisors (see below), whose sum is σ = 22476795105600. Its totient is φ = 5587160790400.

The previous prime is 11580720540839. The next prime is 11580720540863. The reversal of 11580720540856 is 65804502708511.

It is a happy number.

11580720540856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11580720540856² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15399295 + ... + 16133806.

It is an arithmetic number, because the mean of its divisors is an integer number (702399847050).

Almost surely, 2^{11580720540856} is an apocalyptic number.

It is an amenable number.

11580720540856 is a deficient number, since it is larger than the sum of its proper divisors (10896074564744).

11580720540856 is a wasteful number, since it uses less digits than its factorization.

11580720540856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31534719 (or 31534715 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 52.

The spelling of 11580720540856 in words is "eleven trillion, five hundred eighty billion, seven hundred twenty million, five hundred forty thousand, eight hundred fifty-six".