1115055566156 has 72 divisors (see below), whose sum is σ = 2312354640960. Its totient is φ = 468978115872.

The previous prime is 1115055566153. The next prime is 1115055566167. The reversal of 1115055566156 is 6516655505111.

It is a self number, because there is not a number n which added to its sum of digits gives 1115055566156.

It is not an unprimeable number, because it can be changed into a prime (1115055566153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6705935 + ... + 6870201.

It is an arithmetic number, because the mean of its divisors is an integer number (32116036680).

Almost surely, 2^{1115055566156} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115055566156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156177320480).

1115055566156 is an abundant number, since it is smaller than the sum of its proper divisors (1197299074804).

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

1115055566156 is a wasteful number, since it uses less digits than its factorization.

1115055566156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164931 (or 164922 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 47.

The spelling of 1115055566156 in words is "one trillion, one hundred fifteen billion, fifty-five million, five hundred sixty-six thousand, one hundred fifty-six".