161423612203 has 8 divisors (see below), whose sum is σ = 185420597472. Its totient is φ = 137660744256.

The previous prime is 161423612171. The next prime is 161423612209. The reversal of 161423612203 is 302216324161.

161423612203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161423612203 - 2⁵ = 161423612171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161423612209) 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 7 ways as a sum of consecutive naturals, for example, 58527850 + ... + 58530607.

It is an arithmetic number, because the mean of its divisors is an integer number (23177574684).

Almost surely, 2^161423612203 is an apocalyptic number.

161423612203 is a deficient number, since it is larger than the sum of its proper divisors (23996985269).

161423612203 is a wasteful number, since it uses less digits than its factorization.

161423612203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117058661.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 161423612203 its reverse (302216324161), we get a palindrome (463639936364).

The spelling of 161423612203 in words is "one hundred sixty-one billion, four hundred twenty-three million, six hundred twelve thousand, two hundred three".