161825129105 has 16 divisors (see below), whose sum is σ = 202032758784. Its totient is φ = 124297467840.

The previous prime is 161825129093. The next prime is 161825129107. The reversal of 161825129105 is 501921528161.

It is not a de Polignac number, because 161825129105 - 2⁸ = 161825128849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161825129107) 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 15 ways as a sum of consecutive naturals, for example, 4090682 + ... + 4130051.

It is an arithmetic number, because the mean of its divisors is an integer number (12627047424).

Almost surely, 2^161825129105 is an apocalyptic number.

It is an amenable number.

161825129105 is a deficient number, since it is larger than the sum of its proper divisors (40207629679).

161825129105 is a wasteful number, since it uses less digits than its factorization.

161825129105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8220896.

The product of its (nonzero) digits is 43200, while the sum is 41.

The spelling of 161825129105 in words is "one hundred sixty-one billion, eight hundred twenty-five million, one hundred twenty-nine thousand, one hundred five".