161826071825 has 48 divisors (see below), whose sum is σ = 231058544640. Its totient is φ = 111192264000.

The previous prime is 161826071821. The next prime is 161826071839. The reversal of 161826071825 is 528170628161.

161826071825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161826071825 - 2² = 161826071821 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161826071825.

It is not an unprimeable number, because it can be changed into a prime (161826071821) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1875380 + ... + 1959770.

It is an arithmetic number, because the mean of its divisors is an integer number (4813719680).

Almost surely, 2^161826071825 is an apocalyptic number.

It is an amenable number.

161826071825 is a deficient number, since it is larger than the sum of its proper divisors (69232472815).

161826071825 is a wasteful number, since it uses less digits than its factorization.

161826071825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84798 (or 84793 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

Adding to 161826071825 its reverse (528170628161), we get a palindrome (689996699986).

The spelling of 161826071825 in words is "one hundred sixty-one billion, eight hundred twenty-six million, seventy-one thousand, eight hundred twenty-five".