1845345215117 has 2 divisors, whose sum is σ = 1845345215118. Its totient is φ = 1845345215116.

The previous prime is 1845345215081. The next prime is 1845345215167. The reversal of 1845345215117 is 7115125435481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1752713857801 + 92631357316 = 1323901^2 + 304354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1845345215117 - 2⁸ = 1845345214861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1845345215167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922672607558 + 922672607559.

It is an arithmetic number, because the mean of its divisors is an integer number (922672607559).

Almost surely, 2^{1845345215117} is an apocalyptic number.

It is an amenable number.

1845345215117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1845345215117 is an equidigital number, since it uses as much as digits as its factorization.

1845345215117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672000, while the sum is 47.

The spelling of 1845345215117 in words is "one trillion, eight hundred forty-five billion, three hundred forty-five million, two hundred fifteen thousand, one hundred seventeen".