16581054523 has 8 divisors (see below), whose sum is σ = 18090765936. Its totient is φ = 15071733600.

The previous prime is 16581054473. The next prime is 16581054527. The reversal of 16581054523 is 32545018561.

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

It is not a de Polignac number, because 16581054523 - 2²¹ = 16578957371 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16581054527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5008 + ... + 182173.

It is an arithmetic number, because the mean of its divisors is an integer number (2261345742).

Almost surely, 2^16581054523 is an apocalyptic number.

16581054523 is a deficient number, since it is larger than the sum of its proper divisors (1509711413).

16581054523 is a wasteful number, since it uses less digits than its factorization.

16581054523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195245.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 16581054523 in words is "sixteen billion, five hundred eighty-one million, fifty-four thousand, five hundred twenty-three".