11550320018780 has 96 divisors (see below), whose sum is σ = 26281623481344. Its totient is φ = 4246927340544.

The previous prime is 11550320018719. The next prime is 11550320018801. The reversal of 11550320018780 is 8781002305511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369914249 + ... + 369945471.

It is an arithmetic number, because the mean of its divisors is an integer number (273766911264).

Almost surely, 2^{11550320018780} is an apocalyptic number.

11550320018780 is a gapful number since it is divisible by the number (10) 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 11550320018780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13140811740672).

11550320018780 is an abundant number, since it is smaller than the sum of its proper divisors (14731303462564).

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

11550320018780 is a wasteful number, since it uses less digits than its factorization.

11550320018780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56595 (or 56593 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 41.

The spelling of 11550320018780 in words is "eleven trillion, five hundred fifty billion, three hundred twenty million, eighteen thousand, seven hundred eighty".