89485505521 has 2 divisors, whose sum is σ = 89485505522. Its totient is φ = 89485505520.

The previous prime is 89485505513. The next prime is 89485505579. The reversal of 89485505521 is 12550558498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83731524496 + 5753981025 = 289364^2 + 75855^2 .

It is a cyclic number.

It is not a de Polignac number, because 89485505521 - 2³ = 89485505513 is a prime.

It is not a weakly prime, because it can be changed into another prime (89485502521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44742752760 + 44742752761.

It is an arithmetic number, because the mean of its divisors is an integer number (44742752761).

Almost surely, 2^89485505521 is an apocalyptic number.

It is an amenable number.

89485505521 is a deficient number, since it is larger than the sum of its proper divisors (1).

89485505521 is an equidigital number, since it uses as much as digits as its factorization.

89485505521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880000, while the sum is 52.

The spelling of 89485505521 in words is "eighty-nine billion, four hundred eighty-five million, five hundred five thousand, five hundred twenty-one".