42781216403 has 2 divisors, whose sum is σ = 42781216404. Its totient is φ = 42781216402.

The previous prime is 42781216391. The next prime is 42781216433. The reversal of 42781216403 is 30461218724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42781216403 - 2¹⁴ = 42781200019 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42781216433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21390608201 + 21390608202.

It is an arithmetic number, because the mean of its divisors is an integer number (21390608202).

Almost surely, 2^42781216403 is an apocalyptic number.

42781216403 is a deficient number, since it is larger than the sum of its proper divisors (1).

42781216403 is an equidigital number, since it uses as much as digits as its factorization.

42781216403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 42781216403 in words is "forty-two billion, seven hundred eighty-one million, two hundred sixteen thousand, four hundred three".