161134227109 has 4 divisors (see below), whose sum is σ = 161137615680. Its totient is φ = 161130838540.

The previous prime is 161134226999. The next prime is 161134227139. The reversal of 161134227109 is 901722431161.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 161134227109 - 2²¹ = 161132129957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161134227139) 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, 1621927 + ... + 1718404.

It is an arithmetic number, because the mean of its divisors is an integer number (40284403920).

Almost surely, 2^161134227109 is an apocalyptic number.

It is an amenable number.

161134227109 is a deficient number, since it is larger than the sum of its proper divisors (3388571).

161134227109 is an equidigital number, since it uses as much as digits as its factorization.

161134227109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388570.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 161134227109 in words is "one hundred sixty-one billion, one hundred thirty-four million, two hundred twenty-seven thousand, one hundred nine".