42144420625 has 20 divisors (see below), whose sum is σ = 52757649648.
Its totient is φ = 33655370000.
The previous prime is 42144420589. The next prime is 42144420629. The reversal of 42144420625 is 52602444124.
It is not a de Polignac number, because 42144420625 - 221 = 42142323473 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (42144420629) by changing a digit.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 291990 + ... + 411760.
Almost surely, 242144420625 is an apocalyptic number.
It is an amenable number.
42144420625 is a deficient number, since it is larger than the sum of its proper divisors (10613229023).
42144420625 is an equidigital number, since it uses as much as digits as its factorization.
42144420625 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 120354 (or 120339 counting only the distinct ones).
The product of its (nonzero) digits is 61440, while the sum is 34.
Adding to 42144420625 its reverse (52602444124), we get a palindrome (94746864749).
The spelling of 42144420625 in words is "forty-two billion, one hundred forty-four million, four hundred twenty thousand, six hundred twenty-five".