11556255564 has 144 divisors (see below), whose sum is σ = 33988864000. Its totient is φ = 3242498688.

The previous prime is 11556255541. The next prime is 11556255611. The reversal of 11556255564 is 46555265511.

It is a happy number.

11556255564 is a `hidden beast` number, since 1 + 15 + 5 + 625 + 5 + 5 + 6 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3960234 + ... + 3963150.

Almost surely, 2^11556255564 is an apocalyptic number.

11556255564 is a gapful number since it is divisible by the number (14) 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 11556255564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16994432000).

11556255564 is an abundant number, since it is smaller than the sum of its proper divisors (22432608436).

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

11556255564 is a wasteful number, since it uses less digits than its factorization.

11556255564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212 (or 3207 counting only the distinct ones).

The product of its digits is 900000, while the sum is 45.

The spelling of 11556255564 in words is "eleven billion, five hundred fifty-six million, two hundred fifty-five thousand, five hundred sixty-four".