209113824245 has 12 divisors (see below), whose sum is σ = 252346494540. Its totient is φ = 166356345024.

The previous prime is 209113824233. The next prime is 209113824251. The reversal of 209113824245 is 542428311902.

It can be written as a sum of positive squares in 2 ways, for example, as 127396169476 + 81717654769 = 356926^2 + 285863^2 .

It is not a de Polignac number, because 209113824245 - 2¹⁶ = 209113758709 is a prime.

It is a congruent number.

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, 492440 + ... + 812849.

It is an arithmetic number, because the mean of its divisors is an integer number (21028874545).

Almost surely, 2^209113824245 is an apocalyptic number.

It is an amenable number.

209113824245 is a deficient number, since it is larger than the sum of its proper divisors (43232670295).

209113824245 is an equidigital number, since it uses as much as digits as its factorization.

209113824245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305652 (or 1305473 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 209113824245 in words is "two hundred nine billion, one hundred thirteen million, eight hundred twenty-four thousand, two hundred forty-five".