11199879243520 has 144 divisors (see below), whose sum is σ = 29271314903040. Its totient is φ = 4071950438400.

The previous prime is 11199879243493. The next prime is 11199879243521. The reversal of 11199879243520 is 2534297899111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11199879243521) 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, 81468601 + ... + 81605959.

It is an arithmetic number, because the mean of its divisors is an integer number (203273020160).

Almost surely, 2^{11199879243520} is an apocalyptic number.

11199879243520 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 11199879243520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14635657451520).

11199879243520 is an abundant number, since it is smaller than the sum of its proper divisors (18071435659520).

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

11199879243520 is a wasteful number, since it uses less digits than its factorization.

11199879243520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143182 (or 143168 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 11199879243520 in words is "eleven trillion, one hundred ninety-nine billion, eight hundred seventy-nine million, two hundred forty-three thousand, five hundred twenty".