11199545680 has 80 divisors (see below), whose sum is σ = 26450592768. Its totient is φ = 4409216000.

The previous prime is 11199545671. The next prime is 11199545681. The reversal of 11199545680 is 8654599111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11199545681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4321185 + ... + 4323775.

Almost surely, 2^11199545680 is an apocalyptic number.

11199545680 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 11199545680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13225296384).

11199545680 is an abundant number, since it is smaller than the sum of its proper divisors (15251047088).

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

11199545680 is a wasteful number, since it uses less digits than its factorization.

11199545680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436 (or 3430 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 49.

The spelling of 11199545680 in words is "eleven billion, one hundred ninety-nine million, five hundred forty-five thousand, six hundred eighty".