16531016320225 has 192 divisors, whose sum is σ = 24153425510400. Its totient is φ = 11105127936000.

The previous prime is 16531016320219. The next prime is 16531016320243. The reversal of 16531016320225 is 52202361013561.

It is not a de Polignac number, because 16531016320225 - 2⁵ = 16531016320193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 20086289164 + ... + 20086289986.

It is an arithmetic number, because the mean of its divisors is an integer number (125799091200).

Almost surely, 2^{16531016320225} is an apocalyptic number.

It is an amenable number.

16531016320225 is a deficient number, since it is larger than the sum of its proper divisors (7622409190175).

16531016320225 is a wasteful number, since it uses less digits than its factorization.

16531016320225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736 (or 1731 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 16531016320225 its reverse (52202361013561), we get a palindrome (68733377333786).

The spelling of 16531016320225 in words is "sixteen trillion, five hundred thirty-one billion, sixteen million, three hundred twenty thousand, two hundred twenty-five".