16531322651 has 2 divisors, whose sum is σ = 16531322652. Its totient is φ = 16531322650.

The previous prime is 16531322623. The next prime is 16531322659. The reversal of 16531322651 is 15622313561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16531322651 - 2¹⁰ = 16531321627 is a prime.

It is not a weakly prime, because it can be changed into another prime (16531322659) 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 as a sum of consecutive naturals, namely, 8265661325 + 8265661326.

It is an arithmetic number, because the mean of its divisors is an integer number (8265661326).

Almost surely, 2^16531322651 is an apocalyptic number.

16531322651 is a deficient number, since it is larger than the sum of its proper divisors (1).

16531322651 is an equidigital number, since it uses as much as digits as its factorization.

16531322651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The spelling of 16531322651 in words is "sixteen billion, five hundred thirty-one million, three hundred twenty-two thousand, six hundred fifty-one".