1855005200017 has 2 divisors, whose sum is σ = 1855005200018. Its totient is φ = 1855005200016.

The previous prime is 1855005199991. The next prime is 1855005200039. The reversal of 1855005200017 is 7100025005581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990255853456 + 864749346561 = 995116^2 + 929919^2 .

It is an emirp because it is prime and its reverse (7100025005581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1855005200017 - 2¹⁹ = 1855004675729 is a prime.

It is a super-2 number, since 2×1855005200017² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1855005200417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927502600008 + 927502600009.

It is an arithmetic number, because the mean of its divisors is an integer number (927502600009).

Almost surely, 2^{1855005200017} is an apocalyptic number.

It is an amenable number.

1855005200017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1855005200017 is an equidigital number, since it uses as much as digits as its factorization.

1855005200017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 34.

The spelling of 1855005200017 in words is "one trillion, eight hundred fifty-five billion, five million, two hundred thousand, seventeen".