11512056440 has 32 divisors (see below), whose sum is σ = 26266952160. Its totient is φ = 4539964800.

The previous prime is 11512056421. The next prime is 11512056463. The reversal of 11512056440 is 4465021511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2023931 + ... + 2029610.

It is an arithmetic number, because the mean of its divisors is an integer number (820842255).

Almost surely, 2^11512056440 is an apocalyptic number.

11512056440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11512056440 is an abundant number, since it is smaller than the sum of its proper divisors (14754895720).

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

11512056440 is a wasteful number, since it uses less digits than its factorization.

11512056440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053623 (or 4053619 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 11512056440 its reverse (4465021511), we get a palindrome (15977077951).

The spelling of 11512056440 in words is "eleven billion, five hundred twelve million, fifty-six thousand, four hundred forty".