11356666780 has 48 divisors (see below), whose sum is σ = 24558801120. Its totient is φ = 4408121088.

The previous prime is 11356666777. The next prime is 11356666781. The reversal of 11356666780 is 8766665311.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11356666781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260214 + ... + 300706.

It is an arithmetic number, because the mean of its divisors is an integer number (511641690).

Almost surely, 2^11356666780 is an apocalyptic number.

11356666780 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 11356666780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12279400560).

11356666780 is an abundant number, since it is smaller than the sum of its proper divisors (13202134340).

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

11356666780 is a wasteful number, since it uses less digits than its factorization.

11356666780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40918 (or 40916 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 11356666780 in words is "eleven billion, three hundred fifty-six million, six hundred sixty-six thousand, seven hundred eighty".