42416046821 has 2 divisors, whose sum is σ = 42416046822. Its totient is φ = 42416046820.

The previous prime is 42416046793. The next prime is 42416046851. The reversal of 42416046821 is 12864061424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42035250625 + 380796196 = 205025^2 + 19514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42416046821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42416046851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21208023410 + 21208023411.

It is an arithmetic number, because the mean of its divisors is an integer number (21208023411).

Almost surely, 2^42416046821 is an apocalyptic number.

It is an amenable number.

42416046821 is a deficient number, since it is larger than the sum of its proper divisors (1).

42416046821 is an equidigital number, since it uses as much as digits as its factorization.

42416046821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 42416046821 in words is "forty-two billion, four hundred sixteen million, forty-six thousand, eight hundred twenty-one".