1155559916664 has 256 divisors, whose sum is σ = 3367526400000. Its totient is φ = 366699312000.

The previous prime is 1155559916647. The next prime is 1155559916669. The reversal of 1155559916664 is 4666199555511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155559916669) 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 63 ways as a sum of consecutive naturals, for example, 237230149 + ... + 237235019.

It is an arithmetic number, because the mean of its divisors is an integer number (13154400000).

Almost surely, 2^{1155559916664} 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 1155559916664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1683763200000).

1155559916664 is an abundant number, since it is smaller than the sum of its proper divisors (2211966483336).

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

1155559916664 is a wasteful number, since it uses less digits than its factorization.

1155559916664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5487 (or 5477 counting only the distinct ones).

The product of its digits is 43740000, while the sum is 63.

The spelling of 1155559916664 in words is "one trillion, one hundred fifty-five billion, five hundred fifty-nine million, nine hundred sixteen thousand, six hundred sixty-four".