1827540341857 has 4 divisors (see below), whose sum is σ = 1846380964036. Its totient is φ = 1808699719680.

The previous prime is 1827540341797. The next prime is 1827540341873. The reversal of 1827540341857 is 7581430457281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 244865635921 + 1582674705936 = 494839^2 + 1258044^2 .

It is a cyclic number.

It is not a de Polignac number, because 1827540341857 - 2¹⁹ = 1827539817569 is a prime.

It is a super-2 number, since 2×1827540341857² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1827540341798 and 1827540341807.

It is not an unprimeable number, because it can be changed into a prime (1827540341057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9420310944 + ... + 9420311137.

It is an arithmetic number, because the mean of its divisors is an integer number (461595241009).

Almost surely, 2^{1827540341857} is an apocalyptic number.

It is an amenable number.

1827540341857 is a deficient number, since it is larger than the sum of its proper divisors (18840622179).

1827540341857 is an equidigital number, since it uses as much as digits as its factorization.

1827540341857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18840622178.

The product of its (nonzero) digits is 7526400, while the sum is 55.

The spelling of 1827540341857 in words is "one trillion, eight hundred twenty-seven billion, five hundred forty million, three hundred forty-one thousand, eight hundred fifty-seven".