89239216809557 has 2 divisors, whose sum is σ = 89239216809558. Its totient is φ = 89239216809556.

The previous prime is 89239216809521. The next prime is 89239216809601. The reversal of 89239216809557 is 75590861293298.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48745517276401 + 40493699533156 = 6981799^2 + 6363466^2 .

It is a cyclic number.

It is not a de Polignac number, because 89239216809557 - 2²⁸ = 89238948374101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89239216809857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44619608404778 + 44619608404779.

It is an arithmetic number, because the mean of its divisors is an integer number (44619608404779).

Almost surely, 2^{89239216809557} is an apocalyptic number.

It is an amenable number.

89239216809557 is a deficient number, since it is larger than the sum of its proper divisors (1).

89239216809557 is an equidigital number, since it uses as much as digits as its factorization.

89239216809557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 587865600, while the sum is 74.

The spelling of 89239216809557 in words is "eighty-nine trillion, two hundred thirty-nine billion, two hundred sixteen million, eight hundred nine thousand, five hundred fifty-seven".