16455216225 has 24 divisors (see below), whose sum is σ = 31092523840. Its totient is φ = 7522384320.

The previous prime is 16455216143. The next prime is 16455216229. The reversal of 16455216225 is 52261255461.

It is not a de Polignac number, because 16455216225 - 2¹⁰ = 16455215201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16455216229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15671110 + ... + 15672159.

Almost surely, 2^16455216225 is an apocalyptic number.

16455216225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16455216225 is a deficient number, since it is larger than the sum of its proper divisors (14637307615).

16455216225 is a wasteful number, since it uses less digits than its factorization.

16455216225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31343289 (or 31343284 counting only the distinct ones).

The product of its digits is 144000, while the sum is 39.

The spelling of 16455216225 in words is "sixteen billion, four hundred fifty-five million, two hundred sixteen thousand, two hundred twenty-five".