245443663625 has 16 divisors (see below), whose sum is σ = 306830334096. Its totient is φ = 196023750400.

The previous prime is 245443663489. The next prime is 245443663631. The reversal of 245443663625 is 526366344542.

It can be written as a sum of positive squares in 8 ways, for example, as 20661475081 + 224782188544 = 143741^2 + 474112^2 .

It is not a de Polignac number, because 245443663625 - 2¹⁰ = 245443662601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1581482 + ... + 1729731.

It is an arithmetic number, because the mean of its divisors is an integer number (19176895881).

Almost surely, 2^245443663625 is an apocalyptic number.

245443663625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

245443663625 is a deficient number, since it is larger than the sum of its proper divisors (61386670471).

245443663625 is an equidigital number, since it uses as much as digits as its factorization.

245443663625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311821 (or 3311811 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 50.

The spelling of 245443663625 in words is "two hundred forty-five billion, four hundred forty-three million, six hundred sixty-three thousand, six hundred twenty-five".