42144420434 has 4 divisors (see below), whose sum is σ = 63216630654. Its totient is φ = 21072210216.

The previous prime is 42144420427. The next prime is 42144420499. The reversal of 42144420434 is 43402444124.

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., 32629003225 + 9515417209 = 180635^2 + 97547^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42144420434.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536105107 + ... + 10536105110.

Almost surely, 2^42144420434 is an apocalyptic number.

42144420434 is a deficient number, since it is larger than the sum of its proper divisors (21072210220).

42144420434 is a wasteful number, since it uses less digits than its factorization.

42144420434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21072210219.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 42144420434 its reverse (43402444124), we get a palindrome (85546864558).

The spelling of 42144420434 in words is "forty-two billion, one hundred forty-four million, four hundred twenty thousand, four hundred thirty-four".