161065005605 has 16 divisors (see below), whose sum is σ = 220982427264. Its totient is φ = 110397936960.

The previous prime is 161065005599. The next prime is 161065005637. The reversal of 161065005605 is 506500560161.

It is not a de Polignac number, because 161065005605 - 2⁸ = 161065005349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 887462 + ... + 1053431.

It is an arithmetic number, because the mean of its divisors is an integer number (13811401704).

Almost surely, 2^161065005605 is an apocalyptic number.

It is an amenable number.

161065005605 is a deficient number, since it is larger than the sum of its proper divisors (59917421659).

161065005605 is a wasteful number, since it uses less digits than its factorization.

161065005605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943276.

The product of its (nonzero) digits is 27000, while the sum is 35.

Adding to 161065005605 its reverse (506500560161), we get a palindrome (667565565766).

The spelling of 161065005605 in words is "one hundred sixty-one billion, sixty-five million, five thousand, six hundred five".