16945242025 has 6 divisors (see below), whose sum is σ = 21012100142. Its totient is φ = 13556193600.

The previous prime is 16945242023. The next prime is 16945242073. The reversal of 16945242025 is 52024254961.

It can be written as a sum of positive squares in 3 ways, for example, as 360696064 + 16584545961 = 18992^2 + 128781^2 .

It is not a de Polignac number, because 16945242025 - 2¹ = 16945242023 is a prime.

It is a super-2 number, since 2×16945242025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16945242023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 338904816 + ... + 338904865.

Almost surely, 2^16945242025 is an apocalyptic number.

It is an amenable number.

16945242025 is a deficient number, since it is larger than the sum of its proper divisors (4066858117).

16945242025 is an equidigital number, since it uses as much as digits as its factorization.

16945242025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677809691 (or 677809686 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 16945242025 its reverse (52024254961), we get a palindrome (68969496986).

The spelling of 16945242025 in words is "sixteen billion, nine hundred forty-five million, two hundred forty-two thousand, twenty-five".