16531606527 has 4 divisors (see below), whose sum is σ = 22042142040. Its totient is φ = 11021071016.

The previous prime is 16531606493. The next prime is 16531606541. The reversal of 16531606527 is 72560613561.

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 16531606527 - 2¹⁵ = 16531573759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16531606547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2755267752 + ... + 2755267757.

It is an arithmetic number, because the mean of its divisors is an integer number (5510535510).

Almost surely, 2^16531606527 is an apocalyptic number.

16531606527 is a deficient number, since it is larger than the sum of its proper divisors (5510535513).

16531606527 is an equidigital number, since it uses as much as digits as its factorization.

16531606527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510535512.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 16531606527 in words is "sixteen billion, five hundred thirty-one million, six hundred six thousand, five hundred twenty-seven".