11556836307820 has 48 divisors (see below), whose sum is σ = 26525899830528. Its totient is φ = 4210460282880.

The previous prime is 11556836307817. The next prime is 11556836307829. The reversal of 11556836307820 is 2870363865511.

11556836307820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11556836307829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548226477 + ... + 548247556.

It is an arithmetic number, because the mean of its divisors is an integer number (552622913136).

Almost surely, 2^{11556836307820} is an apocalyptic number.

11556836307820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11556836307820 is an abundant number, since it is smaller than the sum of its proper divisors (14969063522708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11556836307820 is a wasteful number, since it uses less digits than its factorization.

11556836307820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096474090 (or 1096474088 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 11556836307820 in words is "eleven trillion, five hundred fifty-six billion, eight hundred thirty-six million, three hundred seven thousand, eight hundred twenty".