89209855565 has 16 divisors (see below), whose sum is σ = 107852812848. Its totient is φ = 70835291136.

The previous prime is 89209855561. The next prime is 89209855577. The reversal of 89209855565 is 56555890298.

It can be written as a sum of positive squares in 8 ways, for example, as 3160913284 + 86048942281 = 56222^2 + 293341^2 .

It is a cyclic number.

It is not a de Polignac number, because 89209855565 - 2² = 89209855561 is a prime.

It is a super-2 number, since 2×89209855565² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89209855498 and 89209855507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89209855561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425987 + ... + 599903.

It is an arithmetic number, because the mean of its divisors is an integer number (6740800803).

Almost surely, 2^89209855565 is an apocalyptic number.

It is an amenable number.

89209855565 is a deficient number, since it is larger than the sum of its proper divisors (18642957283).

89209855565 is a wasteful number, since it uses less digits than its factorization.

89209855565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174688.

The product of its (nonzero) digits is 38880000, while the sum is 62.

The spelling of 89209855565 in words is "eighty-nine billion, two hundred nine million, eight hundred fifty-five thousand, five hundred sixty-five".