11003206640 has 120 divisors (see below), whose sum is σ = 26292431760. Its totient is φ = 4281753600.

The previous prime is 11003206609. The next prime is 11003206691. The reversal of 11003206640 is 4660230011.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79159691 + ... + 79159829.

It is an arithmetic number, because the mean of its divisors is an integer number (219103598).

Almost surely, 2^11003206640 is an apocalyptic number.

11003206640 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 11003206640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13146215880).

11003206640 is an abundant number, since it is smaller than the sum of its proper divisors (15289225120).

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

11003206640 is a wasteful number, since it uses less digits than its factorization.

11003206640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 11003206640 its reverse (4660230011), we get a palindrome (15663436651).

The spelling of 11003206640 in words is "eleven billion, three million, two hundred six thousand, six hundred forty".