845564465513 has 2 divisors, whose sum is σ = 845564465514. Its totient is φ = 845564465512.

The previous prime is 845564465477. The next prime is 845564465569. The reversal of 845564465513 is 315564465548.

It is an a-pointer prime, because the next prime (845564465569) can be obtained adding 845564465513 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440422031449 + 405142434064 = 663643^2 + 636508^2 .

It is a cyclic number.

It is not a de Polignac number, because 845564465513 - 2¹⁴ = 845564449129 is a prime.

It is not a weakly prime, because it can be changed into another prime (845564465413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422782232756 + 422782232757.

It is an arithmetic number, because the mean of its divisors is an integer number (422782232757).

Almost surely, 2^845564465513 is an apocalyptic number.

It is an amenable number.

845564465513 is a deficient number, since it is larger than the sum of its proper divisors (1).

845564465513 is an equidigital number, since it uses as much as digits as its factorization.

845564465513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560000, while the sum is 56.

The spelling of 845564465513 in words is "eight hundred forty-five billion, five hundred sixty-four million, four hundred sixty-five thousand, five hundred thirteen".