11547228655872 has 432 divisors, whose sum is σ = 41538002583168. Its totient is φ = 3003700838400.

The previous prime is 11547228655849. The next prime is 11547228655873. The reversal of 11547228655872 is 27855682274511.

It is a happy number.

11547228655872 is a `hidden beast` number, since 1 + 1 + 5 + 4 + 7 + 2 + 2 + 8 + 6 + 558 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (11547228655873) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14928247 + ... + 15682697.

Almost surely, 2^{11547228655872} is an apocalyptic number.

11547228655872 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 11547228655872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20769001291584).

11547228655872 is an abundant number, since it is smaller than the sum of its proper divisors (29990773927296).

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

11547228655872 is a wasteful number, since it uses less digits than its factorization.

11547228655872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754566 (or 754549 counting only the distinct ones).

The product of its digits is 75264000, while the sum is 63.

The spelling of 11547228655872 in words is "eleven trillion, five hundred forty-seven billion, two hundred twenty-eight million, six hundred fifty-five thousand, eight hundred seventy-two".