16423723420378 has 4 divisors (see below), whose sum is σ = 24635585130570. Its totient is φ = 8211861710188.

The previous prime is 16423723420343. The next prime is 16423723420381. The reversal of 16423723420378 is 87302432732461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15688514922129 + 735208498249 = 3960873^2 + 857443^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4105930855093 + ... + 4105930855096.

Almost surely, 2^{16423723420378} is an apocalyptic number.

16423723420378 is a deficient number, since it is larger than the sum of its proper divisors (8211861710192).

16423723420378 is an equidigital number, since it uses as much as digits as its factorization.

16423723420378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211861710191.

The product of its (nonzero) digits is 8128512, while the sum is 52.

The spelling of 16423723420378 in words is "sixteen trillion, four hundred twenty-three billion, seven hundred twenty-three million, four hundred twenty thousand, three hundred seventy-eight".