245414413135561 has 2 divisors, whose sum is σ = 245414413135562. Its totient is φ = 245414413135560.

The previous prime is 245414413135519. The next prime is 245414413135613. The reversal of 245414413135561 is 165531314414542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156404037945600 + 89010375189961 = 12506160^2 + 9434531^2 .

It is a cyclic number.

It is not a de Polignac number, because 245414413135561 - 2¹⁹ = 245414412611273 is a prime.

It is not a weakly prime, because it can be changed into another prime (245414413135961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122707206567780 + 122707206567781.

It is an arithmetic number, because the mean of its divisors is an integer number (122707206567781).

Almost surely, 2^{245414413135561} is an apocalyptic number.

It is an amenable number.

245414413135561 is a deficient number, since it is larger than the sum of its proper divisors (1).

245414413135561 is an equidigital number, since it uses as much as digits as its factorization.

245414413135561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456000, while the sum is 49.

The spelling of 245414413135561 in words is "two hundred forty-five trillion, four hundred fourteen billion, four hundred thirteen million, one hundred thirty-five thousand, five hundred sixty-one".