99965348011609 has 4 divisors (see below), whose sum is σ = 100088914573620. Its totient is φ = 99841781449600.

The previous prime is 99965348011601. The next prime is 99965348011631. The reversal of 99965348011609 is 90611084356999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76587929611209 + 23377418400400 = 8751453^2 + 4835020^2 .

It is a cyclic number.

It is not a de Polignac number, because 99965348011609 - 2³ = 99965348011601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99965348011601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61783279792 + ... + 61783281409.

It is an arithmetic number, because the mean of its divisors is an integer number (25022228643405).

Almost surely, 2^{99965348011609} is an apocalyptic number.

It is an amenable number.

99965348011609 is a deficient number, since it is larger than the sum of its proper divisors (123566562011).

99965348011609 is a wasteful number, since it uses less digits than its factorization.

99965348011609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123566562010.

The product of its (nonzero) digits is 113374080, while the sum is 70.

The spelling of 99965348011609 in words is "ninety-nine trillion, nine hundred sixty-five billion, three hundred forty-eight million, eleven thousand, six hundred nine".