13585844585861 has 2 divisors, whose sum is σ = 13585844585862. Its totient is φ = 13585844585860.

The previous prime is 13585844585849. The next prime is 13585844585899. The reversal of 13585844585861 is 16858544858531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12748791597025 + 837052988836 = 3570545^2 + 914906^2 .

It is an emirp because it is prime and its reverse (16858544858531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13585844585861 is a prime.

It is a super-2 number, since 2×13585844585861² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13585844585801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6792922292930 + 6792922292931.

It is an arithmetic number, because the mean of its divisors is an integer number (6792922292931).

Almost surely, 2^{13585844585861} is an apocalyptic number.

It is an amenable number.

13585844585861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13585844585861 is an equidigital number, since it uses as much as digits as its factorization.

13585844585861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 737280000, while the sum is 71.

The spelling of 13585844585861 in words is "thirteen trillion, five hundred eighty-five billion, eight hundred forty-four million, five hundred eighty-five thousand, eight hundred sixty-one".