1805817646141 has 2 divisors, whose sum is σ = 1805817646142. Its totient is φ = 1805817646140.

The previous prime is 1805817646097. The next prime is 1805817646183. The reversal of 1805817646141 is 1416467185081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1791705394116 + 14112252025 = 1338546^2 + 118795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1805817646141 - 2⁷ = 1805817646013 is a prime.

It is a super-2 number, since 2×1805817646141² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1805817646541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902908823070 + 902908823071.

It is an arithmetic number, because the mean of its divisors is an integer number (902908823071).

Almost surely, 2^{1805817646141} is an apocalyptic number.

It is an amenable number.

1805817646141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1805817646141 is an equidigital number, since it uses as much as digits as its factorization.

1805817646141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 1805817646141 in words is "one trillion, eight hundred five billion, eight hundred seventeen million, six hundred forty-six thousand, one hundred forty-one".