11111405452 has 12 divisors (see below), whose sum is σ = 22222810960. Its totient is φ = 4762030896.

The previous prime is 11111405443. The next prime is 11111405453. The reversal of 11111405452 is 25450411111.

It is a happy number.

11111405452 is an admirable number.

It is a super-2 number, since 2×11111405452² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11111405453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198417927 + ... + 198417982.

Almost surely, 2^11111405452 is an apocalyptic number.

It is an amenable number.

11111405452 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11111405452 is a wasteful number, since it uses less digits than its factorization.

11111405452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396835920 (or 396835918 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 11111405452 its reverse (25450411111), we get a palindrome (36561816563).

The spelling of 11111405452 in words is "eleven billion, one hundred eleven million, four hundred five thousand, four hundred fifty-two".