11555277912 has 96 divisors (see below), whose sum is σ = 33005044800. Its totient is φ = 3786437664.

The previous prime is 11555277889. The next prime is 11555277917. The reversal of 11555277912 is 21977255511.

11555277912 is a `hidden beast` number, since 1 + 1 + 5 + 552 + 7 + 7 + 91 + 2 = 666.

11555277912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11555277917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64323 + ... + 165069.

It is an arithmetic number, because the mean of its divisors is an integer number (343802550).

Almost surely, 2^11555277912 is an apocalyptic number.

11555277912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11555277912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16502522400).

11555277912 is an abundant number, since it is smaller than the sum of its proper divisors (21449766888).

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

11555277912 is a wasteful number, since it uses less digits than its factorization.

11555277912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100827 (or 100811 counting only the distinct ones).

The product of its digits is 220500, while the sum is 45.

The spelling of 11555277912 in words is "eleven billion, five hundred fifty-five million, two hundred seventy-seven thousand, nine hundred twelve".