42016798216691 has 2 divisors, whose sum is σ = 42016798216692. Its totient is φ = 42016798216690.

The previous prime is 42016798216643. The next prime is 42016798216693. The reversal of 42016798216691 is 19661289761024.

42016798216691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42016798216691 - 2³⁴ = 41999618347507 is a prime.

It is a super-2 number, since 2×42016798216691² (a number of 28 digits) contains 22 as substring.

Together with 42016798216693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42016798216693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21008399108345 + 21008399108346.

It is an arithmetic number, because the mean of its divisors is an integer number (21008399108346).

Almost surely, 2^{42016798216691} is an apocalyptic number.

42016798216691 is a deficient number, since it is larger than the sum of its proper divisors (1).

42016798216691 is an equidigital number, since it uses as much as digits as its factorization.

42016798216691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 42016798216691 in words is "forty-two trillion, sixteen billion, seven hundred ninety-eight million, two hundred sixteen thousand, six hundred ninety-one".