11109564640 has 48 divisors (see below), whose sum is σ = 26253748080. Its totient is φ = 4442572800.

The previous prime is 11109564607. The next prime is 11109564659. The reversal of 11109564640 is 4646590111.

It is a self number, because there is not a number n which added to its sum of digits gives 11109564640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736696 + ... + 751624.

It is an arithmetic number, because the mean of its divisors is an integer number (546953085).

Almost surely, 2^11109564640 is an apocalyptic number.

11109564640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11109564640 is an abundant number, since it is smaller than the sum of its proper divisors (15144183440).

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

11109564640 is a wasteful number, since it uses less digits than its factorization.

11109564640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19595 (or 19587 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 11109564640 in words is "eleven billion, one hundred nine million, five hundred sixty-four thousand, six hundred forty".