245315602409 has 2 divisors, whose sum is σ = 245315602410. Its totient is φ = 245315602408.

The previous prime is 245315602397. The next prime is 245315602447. The reversal of 245315602409 is 904206513542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217235227225 + 28080375184 = 466085^2 + 167572^2 .

It is a cyclic number.

It is not a de Polignac number, because 245315602409 - 2⁴ = 245315602393 is a prime.

It is not a weakly prime, because it can be changed into another prime (245315604409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122657801204 + 122657801205.

It is an arithmetic number, because the mean of its divisors is an integer number (122657801205).

Almost surely, 2^245315602409 is an apocalyptic number.

It is an amenable number.

245315602409 is a deficient number, since it is larger than the sum of its proper divisors (1).

245315602409 is an equidigital number, since it uses as much as digits as its factorization.

245315602409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 245315602409 in words is "two hundred forty-five billion, three hundred fifteen million, six hundred two thousand, four hundred nine".