109847612161 has 4 divisors (see below), whose sum is σ = 125540128192. Its totient is φ = 94155096132.

The previous prime is 109847612159. The next prime is 109847612177. The reversal of 109847612161 is 161216748901.

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, and also an emirpimes, since its reverse is a distinct semiprime: 161216748901 = 13 ⋅12401288377.

It is a cyclic number.

It is not a de Polignac number, because 109847612161 - 2¹ = 109847612159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109847612141) 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, 7846258005 + ... + 7846258018.

It is an arithmetic number, because the mean of its divisors is an integer number (31385032048).

Almost surely, 2^109847612161 is an apocalyptic number.

It is an amenable number.

109847612161 is a deficient number, since it is larger than the sum of its proper divisors (15692516031).

109847612161 is an equidigital number, since it uses as much as digits as its factorization.

109847612161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15692516030.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 109847612161 in words is "one hundred nine billion, eight hundred forty-seven million, six hundred twelve thousand, one hundred sixty-one".