42418285849 has 3 divisors (see below), whose sum is σ = 42418491807. Its totient is φ = 42418079892.

The previous prime is 42418285841. The next prime is 42418285873. The reversal of 42418285849 is 94858281424.

The square root of 42418285849 is 205957.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 38905590025 + 3512695824 = 197245^2 + 59268^2 .

It is not a de Polignac number, because 42418285849 - 2³ = 42418285841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42418285849.

It is not an unprimeable number, because it can be changed into a prime (42418285841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 102979 + ... + 308935.

It is an arithmetic number, because the mean of its divisors is an integer number (14139497269).

Almost surely, 2^42418285849 is an apocalyptic number.

42418285849 is the 205957-th square number.

42418285849 is the 102979-th centered octagonal number.

It is an amenable number.

42418285849 is a deficient number, since it is larger than the sum of its proper divisors (205958).

42418285849 is an frugal number, since it uses more digits than its factorization.

42418285849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411914 (or 205957 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 55.

The spelling of 42418285849 in words is "forty-two billion, four hundred eighteen million, two hundred eighty-five thousand, eight hundred forty-nine".