11556725564544 has 64 divisors (see below), whose sum is σ = 30698082661440. Its totient is φ = 3852175297536.

The previous prime is 11556725564507. The next prime is 11556725564627. The reversal of 11556725564544 is 44546552765511.

It is a tau number, because it is divible by the number of its divisors (64).

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, 25248894 + ... + 25702530.

It is an arithmetic number, because the mean of its divisors is an integer number (479657541585).

Almost surely, 2^{11556725564544} is an apocalyptic number.

It is an amenable number.

11556725564544 is an abundant number, since it is smaller than the sum of its proper divisors (19141357096896).

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

11556725564544 is an equidigital number, since it uses as much as digits as its factorization.

11556725564544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519997 (or 519985 counting only the distinct ones).

The product of its digits is 100800000, while the sum is 60.

The spelling of 11556725564544 in words is "eleven trillion, five hundred fifty-six billion, seven hundred twenty-five million, five hundred sixty-four thousand, five hundred forty-four".