13005055556 has 24 divisors (see below), whose sum is σ = 24748894296. Its totient is φ = 5954618880.

The previous prime is 13005055541. The next prime is 13005055601. The reversal of 13005055556 is 65555050031.

It can be written as a sum of positive squares in 4 ways, for example, as 8163122500 + 4841933056 = 90350^2 + 69584^2 .

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, 2581955 + ... + 2586986.

It is an arithmetic number, because the mean of its divisors is an integer number (1031203929).

Almost surely, 2^13005055556 is an apocalyptic number.

It is an amenable number.

13005055556 is a deficient number, since it is larger than the sum of its proper divisors (11743838740).

13005055556 is a wasteful number, since it uses less digits than its factorization.

13005055556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168999 (or 5168997 counting only the distinct ones).

The product of its (nonzero) digits is 56250, while the sum is 35.

The spelling of 13005055556 in words is "thirteen billion, five million, fifty-five thousand, five hundred fifty-six".