1025567366209 has 3 divisors (see below), whose sum is σ = 1025568378913. Its totient is φ = 1025566353506.

The previous prime is 1025567366203. The next prime is 1025567366221. The reversal of 1025567366209 is 9026637655201.

The square root of 1025567366209 is 1012703.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1025567366209 - 2¹¹ = 1025567364161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025567366203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 506352 + ... + 1519054.

Almost surely, 2^{1025567366209} is an apocalyptic number.

1025567366209 is the 1012703-rd square number.

1025567366209 is the 506352-nd centered octagonal number.

It is an amenable number.

1025567366209 is a deficient number, since it is larger than the sum of its proper divisors (1012704).

1025567366209 is an frugal number, since it uses more digits than its factorization.

1025567366209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025406 (or 1012703 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 1025567366209 in words is "one trillion, twenty-five billion, five hundred sixty-seven million, three hundred sixty-six thousand, two hundred nine".