11009640880 has 160 divisors (see below), whose sum is σ = 30221351424. Its totient is φ = 3651637248.

The previous prime is 11009640853. The next prime is 11009640899. The reversal of 11009640880 is 8804690011.

It is a happy 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, 2574424 + ... + 2578696.

Almost surely, 2^11009640880 is an apocalyptic number.

11009640880 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 11009640880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15110675712).

11009640880 is an abundant number, since it is smaller than the sum of its proper divisors (19211710544).

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

11009640880 is a wasteful number, since it uses less digits than its factorization.

11009640880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443 (or 4437 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 11009640880 in words is "eleven billion, nine million, six hundred forty thousand, eight hundred eighty".