185155154212013 has 2 divisors, whose sum is σ = 185155154212014. Its totient is φ = 185155154212012.

The previous prime is 185155154211991. The next prime is 185155154212031. The reversal of 185155154212013 is 310212451551581.

Together with next prime (185155154212031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103455303004804 + 81699851207209 = 10171298^2 + 9038797^2 .

It is a cyclic number.

It is not a de Polignac number, because 185155154212013 - 2⁸ = 185155154211757 is a prime.

It is a super-4 number, since 4×185155154212013⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185155154212033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92577577106006 + 92577577106007.

It is an arithmetic number, because the mean of its divisors is an integer number (92577577106007).

Almost surely, 2^{185155154212013} is an apocalyptic number.

It is an amenable number.

185155154212013 is a deficient number, since it is larger than the sum of its proper divisors (1).

185155154212013 is an equidigital number, since it uses as much as digits as its factorization.

185155154212013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240000, while the sum is 44.

The spelling of 185155154212013 in words is "one hundred eighty-five trillion, one hundred fifty-five billion, one hundred fifty-four million, two hundred twelve thousand, thirteen".