13500550191 has 4 divisors (see below), whose sum is σ = 18000733592. Its totient is φ = 9000366792.

The previous prime is 13500550181. The next prime is 13500550223. The reversal of 13500550191 is 19105500531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13500550191 - 2²⁹ = 12963679279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13500550181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2250091696 + ... + 2250091701.

It is an arithmetic number, because the mean of its divisors is an integer number (4500183398).

Almost surely, 2^13500550191 is an apocalyptic number.

13500550191 is a deficient number, since it is larger than the sum of its proper divisors (4500183401).

13500550191 is an equidigital number, since it uses as much as digits as its factorization.

13500550191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500183400.

The product of its (nonzero) digits is 3375, while the sum is 30.

The spelling of 13500550191 in words is "thirteen billion, five hundred million, five hundred fifty thousand, one hundred ninety-one".