16505600225 has 24 divisors (see below), whose sum is σ = 20673643320. Its totient is φ = 13071352320.

The previous prime is 16505600197. The next prime is 16505600273. The reversal of 16505600225 is 52200650561.

It can be written as a sum of positive squares in 12 ways, for example, as 761373649 + 15744226576 = 27593^2 + 125476^2 .

It is not a de Polignac number, because 16505600225 - 2³⁰ = 15431858401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16505600191 and 16505600200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4066397 + ... + 4070453.

It is an arithmetic number, because the mean of its divisors is an integer number (861401805).

Almost surely, 2^16505600225 is an apocalyptic number.

It is an amenable number.

16505600225 is a deficient number, since it is larger than the sum of its proper divisors (4168043095).

16505600225 is a wasteful number, since it uses less digits than its factorization.

16505600225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5669 (or 5664 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 16505600225 in words is "sixteen billion, five hundred five million, six hundred thousand, two hundred twenty-five".