243126161621342 has 4 divisors (see below), whose sum is σ = 364689242432016. Its totient is φ = 121563080810670.

The previous prime is 243126161621333. The next prime is 243126161621353.

243126161621342 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×243126161621342² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243126161621293 and 243126161621302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60781540405334 + ... + 60781540405337.

It is an arithmetic number, because the mean of its divisors is an integer number (91172310608004).

Almost surely, 2^{243126161621342} is an apocalyptic number.

243126161621342 is a deficient number, since it is larger than the sum of its proper divisors (121563080810674).

243126161621342 is a wasteful number, since it uses less digits than its factorization.

243126161621342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121563080810673.

The product of its digits is 497664, while the sum is 44.

The spelling of 243126161621342 in words is "two hundred forty-three trillion, one hundred twenty-six billion, one hundred sixty-one million, six hundred twenty-one thousand, three hundred forty-two".