42091611533689 has 2 divisors, whose sum is σ = 42091611533690. Its totient is φ = 42091611533688.

The previous prime is 42091611533681. The next prime is 42091611533773. The reversal of 42091611533689 is 98633511619024.

42091611533689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37008570740089 + 5083040793600 = 6083467^2 + 2254560^2 .

It is a cyclic number.

It is not a de Polignac number, because 42091611533689 - 2³ = 42091611533681 is a prime.

It is not a weakly prime, because it can be changed into another prime (42091611533681) 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, 21045805766844 + 21045805766845.

It is an arithmetic number, because the mean of its divisors is an integer number (21045805766845).

Almost surely, 2^{42091611533689} is an apocalyptic number.

It is an amenable number.

42091611533689 is a deficient number, since it is larger than the sum of its proper divisors (1).

42091611533689 is an equidigital number, since it uses as much as digits as its factorization.

42091611533689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 58.

The spelling of 42091611533689 in words is "forty-two trillion, ninety-one billion, six hundred eleven million, five hundred thirty-three thousand, six hundred eighty-nine".