16165040225 has 12 divisors (see below), whose sum is σ = 20061803760. Its totient is φ = 12920965200.

The previous prime is 16165040207. The next prime is 16165040231. The reversal of 16165040225 is 52204056161.

It is not a de Polignac number, because 16165040225 - 2¹⁰ = 16165039201 is a prime.

It is a super-2 number, since 2×16165040225² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16165040191 and 16165040200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246815 + ... + 305364.

It is an arithmetic number, because the mean of its divisors is an integer number (1671816980).

Almost surely, 2^16165040225 is an apocalyptic number.

It is an amenable number.

16165040225 is a deficient number, since it is larger than the sum of its proper divisors (3896763535).

16165040225 is a wasteful number, since it uses less digits than its factorization.

16165040225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553360 (or 553355 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 16165040225 its reverse (52204056161), we get a palindrome (68369096386).

The spelling of 16165040225 in words is "sixteen billion, one hundred sixty-five million, forty thousand, two hundred twenty-five".