420144144342434 has 8 divisors (see below), whose sum is σ = 630216651180780. Its totient is φ = 210071927282176.

The previous prime is 420144144342421. The next prime is 420144144342437. The reversal of 420144144342434 is 434243441441024.

It can be written as a sum of positive squares in 2 ways, for example, as 418214892791809 + 1929251550625 = 20450303^2 + 1388975^2 .

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

It is a super-2 number, since 2×420144144342434² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420144144342437) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 68782799 + ... + 74641554.

Almost surely, 2^{420144144342434} is an apocalyptic number.

420144144342434 is a deficient number, since it is larger than the sum of its proper divisors (210072506838346).

420144144342434 is a wasteful number, since it uses less digits than its factorization.

420144144342434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144889044.

The product of its (nonzero) digits is 2359296, while the sum is 44.

Adding to 420144144342434 its reverse (434243441441024), we get a palindrome (854387585783458).

The spelling of 420144144342434 in words is "four hundred twenty trillion, one hundred forty-four billion, one hundred forty-four million, three hundred forty-two thousand, four hundred thirty-four".