11556555005000 has 40 divisors (see below), whose sum is σ = 27077008388430. Its totient is φ = 4622622000000.

The previous prime is 11556555004931. The next prime is 11556555005077. The reversal of 11556555005000 is 50055565511.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 917959442404 + 10638595562596 = 958102^2 + 3261686^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1155650501 + ... + 1155660500.

Almost surely, 2^{11556555005000} is an apocalyptic number.

11556555005000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11556555005000 is an abundant number, since it is smaller than the sum of its proper divisors (15520453383430).

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

11556555005000 is an equidigital number, since it uses as much as digits as its factorization.

11556555005000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311311027 (or 2311311008 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 11556555005000 in words is "eleven trillion, five hundred fifty-six billion, five hundred fifty-five million, five thousand".