9209665645025 has 48 divisors (see below), whose sum is σ = 12110837981760. Its totient is φ = 6927832166400.

The previous prime is 9209665644967. The next prime is 9209665645027. The reversal of 9209665645025 is 5205465669029.

It is not a de Polignac number, because 9209665645025 - 2²² = 9209661450721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9209665645027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 672673430 + ... + 672687120.

It is an arithmetic number, because the mean of its divisors is an integer number (252309124620).

Almost surely, 2^{9209665645025} is an apocalyptic number.

9209665645025 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9209665645025 is a deficient number, since it is larger than the sum of its proper divisors (2901172336735).

9209665645025 is a wasteful number, since it uses less digits than its factorization.

9209665645025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24194 (or 24189 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 9209665645025 in words is "nine trillion, two hundred nine billion, six hundred sixty-five million, six hundred forty-five thousand, twenty-five".