165530464035561 has 16 divisors (see below), whose sum is σ = 253686534921600. Its totient is φ = 106548344666064.

The previous prime is 165530464035523. The next prime is 165530464035617.

165530464035561 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 3 + 0 + 4 + 6 + 40 + 35 + 561 = 666.

165530464035561 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 165530464035561 - 2¹⁴ = 165530464019177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165530464035498 and 165530464035507.

It is not an unprimeable number, because it can be changed into a prime (165530464035061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105702722101 + ... + 105702723666.

It is an arithmetic number, because the mean of its divisors is an integer number (15855408432600).

Almost surely, 2^{165530464035561} is an apocalyptic number.

It is an amenable number.

165530464035561 is a deficient number, since it is larger than the sum of its proper divisors (88156070886039).

165530464035561 is a wasteful number, since it uses less digits than its factorization.

165530464035561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211405445805 (or 211405445799 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 54.

The spelling of 165530464035561 in words is "one hundred sixty-five trillion, five hundred thirty billion, four hundred sixty-four million, thirty-five thousand, five hundred sixty-one".