42421717648 has 10 divisors (see below), whose sum is σ = 82192077974. Its totient is φ = 21210858816.

The previous prime is 42421717643. The next prime is 42421717673. The reversal of 42421717648 is 84671712424.

It can be written as a sum of positive squares in only one way, i.e., 30987265024 + 11434452624 = 176032^2 + 106932^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42421717598 and 42421717607.

It is not an unprimeable number, because it can be changed into a prime (42421717643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325678661 + ... + 1325678692.

Almost surely, 2^42421717648 is an apocalyptic number.

It is an amenable number.

42421717648 is a deficient number, since it is larger than the sum of its proper divisors (39770360326).

42421717648 is a wasteful number, since it uses less digits than its factorization.

42421717648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651357361 (or 2651357355 counting only the distinct ones).

The product of its digits is 602112, while the sum is 46.

The spelling of 42421717648 in words is "forty-two billion, four hundred twenty-one million, seven hundred seventeen thousand, six hundred forty-eight".