11011111452 has 72 divisors (see below), whose sum is σ = 30395055600. Its totient is φ = 3333285120.

The previous prime is 11011111451. The next prime is 11011111469. The reversal of 11011111452 is 25411111011.

11011111452 is a `hidden beast` number, since 1 + 101 + 1 + 111 + 452 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387424 + ... + 414872.

It is an arithmetic number, because the mean of its divisors is an integer number (422153550).

Almost surely, 2^11011111452 is an apocalyptic number.

11011111452 is a gapful number since it is divisible by the number (12) 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 11011111452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15197527800).

11011111452 is an abundant number, since it is smaller than the sum of its proper divisors (19383944148).

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

11011111452 is a wasteful number, since it uses less digits than its factorization.

11011111452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28483 (or 28478 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 18.

Adding to 11011111452 its reverse (25411111011), we get a palindrome (36422222463).

The spelling of 11011111452 in words is "eleven billion, eleven million, one hundred eleven thousand, four hundred fifty-two".