1927805443345 has 8 divisors (see below), whose sum is σ = 2313492143976. Its totient is φ = 1542160613376.

The previous prime is 1927805443313. The next prime is 1927805443367. The reversal of 1927805443345 is 5433445087291.

It can be written as a sum of positive squares in 4 ways, for example, as 126795815056 + 1801009628289 = 356084^2 + 1342017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1927805443345 - 2⁵ = 1927805443313 is a prime.

It is a super-2 number, since 2×1927805443345² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10366282 + ... + 10550611.

It is an arithmetic number, because the mean of its divisors is an integer number (289186517997).

Almost surely, 2^{1927805443345} is an apocalyptic number.

It is an amenable number.

1927805443345 is a deficient number, since it is larger than the sum of its proper divisors (385686700631).

1927805443345 is a wasteful number, since it uses less digits than its factorization.

1927805443345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20935331.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 1927805443345 in words is "one trillion, nine hundred twenty-seven billion, eight hundred five million, four hundred forty-three thousand, three hundred forty-five".