13543550001 has 20 divisors (see below), whose sum is σ = 20236359924. Its totient is φ = 9026964000.

The previous prime is 13543549993. The next prime is 13543550011. The reversal of 13543550001 is 10005534531.

It can be written as a sum of positive squares in 2 ways, for example, as 10852430625 + 2691119376 = 104175^2 + 51876^2 .

It is not a de Polignac number, because 13543550001 - 2³ = 13543549993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13543550011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 390051 + ... + 423351.

Almost surely, 2^13543550001 is an apocalyptic number.

It is an amenable number.

13543550001 is a deficient number, since it is larger than the sum of its proper divisors (6692809923).

13543550001 is an equidigital number, since it uses as much as digits as its factorization.

13543550001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38334 (or 38325 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 13543550001 in words is "thirteen billion, five hundred forty-three million, five hundred fifty thousand, one".