11011055640 has 128 divisors (see below), whose sum is σ = 35628465600. Its totient is φ = 2706278400.

The previous prime is 11011055597. The next prime is 11011055647. The reversal of 11011055640 is 4655011011.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11011055640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011055647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1088526 + ... + 1098594.

Almost surely, 2^11011055640 is an apocalyptic number.

11011055640 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 11011055640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17814232800).

11011055640 is an abundant number, since it is smaller than the sum of its proper divisors (24617409960).

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

11011055640 is a wasteful number, since it uses less digits than its factorization.

11011055640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10797 (or 10793 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 11011055640 its reverse (4655011011), we get a palindrome (15666066651).

The spelling of 11011055640 in words is "eleven billion, eleven million, fifty-five thousand, six hundred forty".