11179543920 has 80 divisors (see below), whose sum is σ = 34775086752. Its totient is φ = 2971018240.

The previous prime is 11179543861. The next prime is 11179543937. The reversal of 11179543920 is 2934597111.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9171 + ... + 149810.

Almost surely, 2^11179543920 is an apocalyptic number.

11179543920 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 11179543920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17387543376).

11179543920 is an abundant number, since it is smaller than the sum of its proper divisors (23595542832).

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

11179543920 is a wasteful number, since it uses less digits than its factorization.

11179543920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159290 (or 159284 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The spelling of 11179543920 in words is "eleven billion, one hundred seventy-nine million, five hundred forty-three thousand, nine hundred twenty".