245343320203409 has 2 divisors, whose sum is σ = 245343320203410. Its totient is φ = 245343320203408.

The previous prime is 245343320203391. The next prime is 245343320203451. The reversal of 245343320203409 is 904302023343542.

245343320203409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150223091441809 + 95120228761600 = 12256553^2 + 9752960^2 .

It is a cyclic number.

It is not a de Polignac number, because 245343320203409 - 2⁸ = 245343320203153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 245343320203409.

It is not a weakly prime, because it can be changed into another prime (245343320203489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122671660101704 + 122671660101705.

It is an arithmetic number, because the mean of its divisors is an integer number (122671660101705).

Almost surely, 2^{245343320203409} is an apocalyptic number.

It is an amenable number.

245343320203409 is a deficient number, since it is larger than the sum of its proper divisors (1).

245343320203409 is an equidigital number, since it uses as much as digits as its factorization.

245343320203409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 44.

The spelling of 245343320203409 in words is "two hundred forty-five trillion, three hundred forty-three billion, three hundred twenty million, two hundred three thousand, four hundred nine".