13043755561 has 8 divisors (see below), whose sum is σ = 13612838400. Its totient is φ = 12474836352.

The previous prime is 13043755513. The next prime is 13043755589. The reversal of 13043755561 is 16555734031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13043755561 - 2³¹ = 10896271913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13043755591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138856 + ... + 212998.

It is an arithmetic number, because the mean of its divisors is an integer number (1701604800).

Almost surely, 2^13043755561 is an apocalyptic number.

It is an amenable number.

13043755561 is a deficient number, since it is larger than the sum of its proper divisors (569082839).

13043755561 is an equidigital number, since it uses as much as digits as its factorization.

13043755561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81815.

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 13043755561 in words is "thirteen billion, forty-three million, seven hundred fifty-five thousand, five hundred sixty-one".