16288780225 has 24 divisors (see below), whose sum is σ = 20324914400. Its totient is φ = 12949355520.

The previous prime is 16288780223. The next prime is 16288780247. The reversal of 16288780225 is 52208788261.

It is not a de Polignac number, because 16288780225 - 2¹ = 16288780223 is a prime.

It is a super-2 number, since 2×16288780225² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16288780223) 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, 8196682 + ... + 8198668.

Almost surely, 2^16288780225 is an apocalyptic number.

It is an amenable number.

16288780225 is a deficient number, since it is larger than the sum of its proper divisors (4036134175).

16288780225 is a wasteful number, since it uses less digits than its factorization.

16288780225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889 (or 3884 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 16288780225 in words is "sixteen billion, two hundred eighty-eight million, seven hundred eighty thousand, two hundred twenty-five".