16531134551 has 4 divisors (see below), whose sum is σ = 16763967504. Its totient is φ = 16298301600.

The previous prime is 16531134511. The next prime is 16531134559. The reversal of 16531134551 is 15543113561.

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

It is a cyclic number.

It is not a de Polignac number, because 16531134551 - 2¹⁰ = 16531133527 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 (16531134559) 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, 116416370 + ... + 116416511.

It is an arithmetic number, because the mean of its divisors is an integer number (4190991876).

Almost surely, 2^16531134551 is an apocalyptic number.

16531134551 is a deficient number, since it is larger than the sum of its proper divisors (232832953).

16531134551 is an equidigital number, since it uses as much as digits as its factorization.

16531134551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232832952.

The product of its digits is 27000, while the sum is 35.

The spelling of 16531134551 in words is "sixteen billion, five hundred thirty-one million, one hundred thirty-four thousand, five hundred fifty-one".