98809565665 has 8 divisors (see below), whose sum is σ = 118993443048. Its totient is φ = 78766343040.

The previous prime is 98809565653. The next prime is 98809565669. The reversal of 98809565665 is 56656590889.

It can be written as a sum of positive squares in 4 ways, for example, as 48169714576 + 50639851089 = 219476^2 + 225033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 98809565665 - 2⁷ = 98809565537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 98809565665.

It is not an unprimeable number, because it can be changed into a prime (98809565669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35162142 + ... + 35164951.

It is an arithmetic number, because the mean of its divisors is an integer number (14874180381).

Almost surely, 2^98809565665 is an apocalyptic number.

It is an amenable number.

98809565665 is a deficient number, since it is larger than the sum of its proper divisors (20183877383).

98809565665 is a wasteful number, since it uses less digits than its factorization.

98809565665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70327379.

The product of its (nonzero) digits is 139968000, while the sum is 67.

The spelling of 98809565665 in words is "ninety-eight billion, eight hundred nine million, five hundred sixty-five thousand, six hundred sixty-five".