99609989761 has 8 divisors (see below), whose sum is σ = 100238552064. Its totient is φ = 98982542880.

The previous prime is 99609989723. The next prime is 99609989789. The reversal of 99609989761 is 16798990699.

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

It is a cyclic number.

It is not a de Polignac number, because 99609989761 - 2¹⁵ = 99609956993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99609986761) 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, 99325 + ... + 457258.

It is an arithmetic number, because the mean of its divisors is an integer number (12529819008).

Almost surely, 2^99609989761 is an apocalyptic number.

It is an amenable number.

99609989761 is a deficient number, since it is larger than the sum of its proper divisors (628562303).

99609989761 is a wasteful number, since it uses less digits than its factorization.

99609989761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557711.

The product of its (nonzero) digits is 119042784, while the sum is 73.

The spelling of 99609989761 in words is "ninety-nine billion, six hundred nine million, nine hundred eighty-nine thousand, seven hundred sixty-one".