161423542438 has 8 divisors (see below), whose sum is σ = 242154479160. Its totient is φ = 80705382720.

The previous prime is 161423542417. The next prime is 161423542451. The reversal of 161423542438 is 834245324161.

161423542438 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 a junction number, because it is equal to n+sod(n) for n = 161423542394 and 161423542403.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3162603 + ... + 3213238.

It is an arithmetic number, because the mean of its divisors is an integer number (30269309895).

Almost surely, 2^161423542438 is an apocalyptic number.

161423542438 is a deficient number, since it is larger than the sum of its proper divisors (80730936722).

161423542438 is a wasteful number, since it uses less digits than its factorization.

161423542438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6388502.

The product of its digits is 552960, while the sum is 43.

Adding to 161423542438 its reverse (834245324161), we get a palindrome (995668866599).

The spelling of 161423542438 in words is "one hundred sixty-one billion, four hundred twenty-three million, five hundred forty-two thousand, four hundred thirty-eight".