13566545256 has 64 divisors (see below), whose sum is σ = 37697814720. Its totient is φ = 4033502720.

The previous prime is 13566545191. The next prime is 13566545263. The reversal of 13566545256 is 65254566531.

It is a super-2 number, since 2×13566545256² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470805 + ... + 498788.

It is an arithmetic number, because the mean of its divisors is an integer number (589028355).

Almost surely, 2^13566545256 is an apocalyptic number.

It is an amenable number.

13566545256 is an abundant number, since it is smaller than the sum of its proper divisors (24131269464).

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

13566545256 is a wasteful number, since it uses less digits than its factorization.

13566545256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969666 (or 969662 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 48.

The spelling of 13566545256 in words is "thirteen billion, five hundred sixty-six million, five hundred forty-five thousand, two hundred fifty-six".