1543135505605 has 4 divisors (see below), whose sum is σ = 1851762606732. Its totient is φ = 1234508404480.

The previous prime is 1543135505599. The next prime is 1543135505627. The reversal of 1543135505605 is 5065055313451.

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 661087703329 + 882047802276 = 813073^2 + 939174^2 .

It is not a de Polignac number, because 1543135505605 - 2³¹ = 1540988021957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154313550556 + ... + 154313550565.

It is an arithmetic number, because the mean of its divisors is an integer number (462940651683).

Almost surely, 2^{1543135505605} is an apocalyptic number.

It is an amenable number.

1543135505605 is a deficient number, since it is larger than the sum of its proper divisors (308627101127).

1543135505605 is an equidigital number, since it uses as much as digits as its factorization.

1543135505605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308627101126.

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 1543135505605 in words is "one trillion, five hundred forty-three billion, one hundred thirty-five million, five hundred five thousand, six hundred five".