1065555115161 has 4 divisors (see below), whose sum is σ = 1420740153552. Its totient is φ = 710370076772.

The previous prime is 1065555115091. The next prime is 1065555115171. The reversal of 1065555115161 is 1615115555601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1065555115161 - 2¹⁰ = 1065555114137 is a prime.

It is a super-2 number, since 2×1065555115161² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1065555115171) 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, 177592519191 + ... + 177592519196.

It is an arithmetic number, because the mean of its divisors is an integer number (355185038388).

Almost surely, 2^{1065555115161} is an apocalyptic number.

It is an amenable number.

1065555115161 is a deficient number, since it is larger than the sum of its proper divisors (355185038391).

1065555115161 is an equidigital number, since it uses as much as digits as its factorization.

1065555115161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355185038390.

The product of its (nonzero) digits is 112500, while the sum is 42.

The spelling of 1065555115161 in words is "one trillion, sixty-five billion, five hundred fifty-five million, one hundred fifteen thousand, one hundred sixty-one".