84521591059 has 2 divisors, whose sum is σ = 84521591060. Its totient is φ = 84521591058.

The previous prime is 84521591057. The next prime is 84521591081. The reversal of 84521591059 is 95019512548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84521591059 - 2¹ = 84521591057 is a prime.

Together with 84521591057, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (84521591057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42260795529 + 42260795530.

It is an arithmetic number, because the mean of its divisors is an integer number (42260795530).

Almost surely, 2^84521591059 is an apocalyptic number.

84521591059 is a deficient number, since it is larger than the sum of its proper divisors (1).

84521591059 is an equidigital number, since it uses as much as digits as its factorization.

84521591059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 49.

The spelling of 84521591059 in words is "eighty-four billion, five hundred twenty-one million, five hundred ninety-one thousand, fifty-nine".