42013566613 has 2 divisors, whose sum is σ = 42013566614. Its totient is φ = 42013566612.

The previous prime is 42013566611. The next prime is 42013566671. The reversal of 42013566613 is 31666531024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23610473649 + 18403092964 = 153657^2 + 135658^2 .

It is a cyclic number.

It is not a de Polignac number, because 42013566613 - 2¹ = 42013566611 is a prime.

Together with 42013566611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42013566611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006783306 + 21006783307.

It is an arithmetic number, because the mean of its divisors is an integer number (21006783307).

Almost surely, 2^42013566613 is an apocalyptic number.

It is an amenable number.

42013566613 is a deficient number, since it is larger than the sum of its proper divisors (1).

42013566613 is an equidigital number, since it uses as much as digits as its factorization.

42013566613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 42013566613 in words is "forty-two billion, thirteen million, five hundred sixty-six thousand, six hundred thirteen".